After spending 3 years in a forced, brutal, sometimes-lethal, survivalist training school where the leadership complains about the cost on every appearance, the MC and Co are sent out on their first mission with nothing but a poor-quality knife, zero intel about what they might be facing, little-to-no information on what they should be scavenging and how, and zero combat training. And it's done under 'instructors' that can't care less if the poor suckers survive - and most of them don't. So much for whining about how expensive they are to train. Later, after all the buildup of how deadly the environment is, the MC does everything he could possibly do wrong in that sort of environment, and has no problems. Granted, he later gets a macguffin that eliminates those threats, but he shouldn't have survived that long in the 1st place. Next it's exposed that they aren't told about the most valuable things they can retrieve, and even if they do, they are short-changed by more then an order of magnitude, if not robbed outright. The entire segment is nothing but an author wank for how stupidly evil the entire leadership is, and how wonderful the MC must be to triumph. Blech.

The MC is a genius of the past that survived a nuclear apocalypse thanks to his invention, 'cold storage', which put him in a hibernating state for 300 years. When he wakes up he coincidentally arrives at a orphanage. He is adopted and soon drafted in the special military that deals with dangers behind the wall that protects the city. He first becomes a scavenger, one who searches for vestiges of the past in the safe areas outside the wall, and later becomes a hunter, one who hunts dangerous, mutated animals. He has a group of friends since the military academy, the ones he calls 'brothers', and another pack of friends from the orphanage, friends with disabilities that he plans on using to create facilities where he will develop the former society, a mission entrusted to him by his father. Now here comes the first huge division. He falls in love and plans on discarding everything. Absolutely everything. He forgets about his friends from the military academy, he forgets about his friends from the orphanage, about the mission entrusted by his father and plans on having s*x with a beauty until he dies... Or not, her father would not allow it so he sends him to the highest security prison "cough"gay camp"cough". Yeah, you read that well, he is almost raped the second he arrives in his cell after he is brutally tortured. He manages to remain with his normal butt hole, but everyone else in that prison is f**king asses like there is no tomorrow. In the end he finally escapes after five years and manages to get the help of a weakened noble family, that bails him with a few words and a sh*tload of money. He gets revenge on the corrupt judge and then he starts his plan to raise the status of the noble family that bailed him. He remembers about his friends from the orphanage and he plans to use them, but now one of them has decided to quit the group, so he remains with three of them. Soon after that he forgets about them once again. Anyway, from this point on he is going to invent new things (about two), train from time to time (one, two hours a day), joins the alchemist faction which is evil in the face of the holy faction (spends a few hours once and never returns), and then joins the holy faction which is annoying in the face of the alchemist faction (even though he might get caught f**king with both). I still can't grasp the reason, but his gains amount to 0 beside some money and a little status. Before joining the holy faction he cripples his left hand btw. And now he needs to repair that one too. Anyway, now he becomes the perfect assassin after training fora few months on how to use knives with only one hand. Like this he manages to kill about five knights from the alchemist division.... Why? well, he wanted to recover the chip containing all the patents of the former modern world from the 'cold storage device' that arrived in the hands of the alchemist faction. So he killed them. And also faces one of the strongest knights of this faction even though his knowledge about close combat amounts to a few months of training. At this point he also start forgetting about the noble family that he promised to help. At chapter 241 he starts a holographic device containing all of the inventions of the past and plans on using them to gain status most probably in both factions. Why did I drop it here? Until now the story hasn't managed to create a stable footing for the MC, can you imagine the author being able to so now that he is trying to recreate the industrial revolution? In the end what is the name of this novel? The inventor king? The kid with PTSD and Alzheimer? No, he is the dark king. So dark that I have no f**king idea what is in the end his real plan, his real skill, and so on.

So, to reduce everything to + and -
Pros
+ A smart MC
+ Interesting beginning
+ Interesting power ups
+ Interesting side characters
+ realistic plot
Cons
- The plot goes through the shredder
- The side characters are changed faster than socks
- He doesn't obtain any new useful abilities even after he is capable of hunting by himself beside strength enhancing
- His revenge stops after killing one judge
- The so called friends disappear from the story for no reason whatsoever
- The MC becomes extremely ruthless almost instantly.
- The MC tends to forget about important missions and promises.
- The world itself even after 241 chapters is not explained, but we finally get a clue. It seems the story has stolen a lot of things from "attack on titan". For some reason now the noble families are actually in the outer city. There is another one. An inner city. The MC never tried to find t his information.
- Finally, no offense, the translation is extremely crappy. Better than machine translation by a little.

Let me start by saying that the development of the MCs character is slow in the beginning. Note, he's nine when he woke up 300 years in the future with a society where aristocracy and the church dominate people's lives. Also both his mind and body has not aged so there is no doubt that his thinking will remain in the peaceful era. Don't expect for him to suddenly become a badass. It will happen eventually.

Also note that his starting point is extremely low, even with his superior intellect, basically anything and everything can casually wave and end his little life. Worse we see how much of a behemoth of an enemy (s) he's dealing with, coupled with superior super soldiers that can kill him with a slap. Understanding why people pushed him around easily. The creatures he has to fight are OP AF even for the strongest bastards known in the story thus far.

But fate would have it that he struggles (along with tremendous luck, even though I wouldn't call it good luck :p) and lives through some sh*t, waking him up from his hopeful fantasies and the thoughts of romance, that grinds him into a cold, proud, descisive, calculating, insidious youth shrouded with darkness and mystique.
Imagine that young handsome talented villain that you see in most CN novels that always seems better than the MC in every aspect that everyone can't help but worship even when we know he's totally evil. Thats Dean.

... Thought about it?

I particularly liked the romance/breakup with Jenny and the whole prison arc which really shows how the MC grows as a person and in smarts.

I think the MC had no choice but to go on a dark path since the beginning. It makes me really sad because this kind kid had to carry a huge burden. How else can he change people views and bring back old technology? Obviously a brainwash society will try to stop him from bringing change. He needs to be a King who brings fear. He has no choice. In order to bring to the best results. I really think Jenny is the light of his life and he still shows that he cares about her but wants nothing to do with her. I can't blame Jenny but I hope she seriously makes it up to the MC. She has to get angry too. I still feel furious for Jenny betraying the MC but you can't blame her for being brainwashed... I like the fact the MC has loyal friends who have his back. He might had lost his adoptive parents but he was never truly alone after that. He still had a few loyal friends and a old man who saw MC like a son. Only a few have betrayed but MC always one step ahead and is not stupid. Even if they betray him. He will still win.

Instead, adoptive parents are willing to sell their children, teachers are willing to throw kids into the wilderness, the church lies to everyone to maintain power, the scientists who oppose the church's hypocrisy are willing to indulge in human experimentation, the warriors who defend civilization are happy to use 10-year-olds as bait, noblemen would rather kill a kid then tell their daughter they can't marry that kid...