- Do you sometimes even think he's s*upid? Because he comes with the speech of wanting to "help the people from earth", some of his actions are very bad and of course generate CONSEQUENCES, it's something like "MC decided to do X" but you, as a reader, imagine what that would entail, the Author even puts the consequences, BUT, the MC doesn't reflect at any point on his actions because "duh I'm lonely, f*ck I don't care", and we have other points where there could have been a development and nothing happens.
- About the 1st son, I even thought that the MC would have a development from that, but nothing happens, besides the son being a very boring character.
- The MC's plot armor is gigantic, the MC is practically a Korean Batman, he is prepared for anything, because conveniently what he "crafted" served for that purpose, this is even taken in a comedy tone in the work, the sense of " risk" is practically non-existent.
- In this work there are beings who lived many years, they are even older than the MC himself, but they are all conveniently DUMB to make the MC smart, combine this with the point above, the MC practically becomes an Immortal simply because "he was prepared " and conveniently what he did even for not caring, turns into something great.
- Another point is because the MC is strong, it is emphasized several times in the WN about the "Sub-Class" and the importance of their Leveling, but we are talking about a universe with entities with MANY years of life, and ABSOLUTELY NONE OF THEM, have developed no interest in these crafts is non-sense.

The story starts with Earth having filled its experience gauge. So, it will start to experience its first cataclysm and take its first step in evolution. Due to that, the new energy mana will be generated in the world, At the same time, Akashic records will also come into contact with the world. It is similar to a system that records all beings, gives them experience and records of the other beings killed by the users, and drives as well as guides them on the path of evolution. But monsters will also be generated when mana comes into contact with a world and the first cataclysm occurs. So, to prepare the people of Earth as well as to make them adapt to the new energy god decides to send them to isekai worlds for ten years. During that ten years' time will remain halted on Earth and all the level-ups the people get will be erased as well. But our MC was left out because of a mistake. But he wasn't alone. To compensate for the mistake that he was left out, Heaven sent an angel to look after him during those ten years. And to not waste the ten years of buffer time he gets; he starts training his body as well as martial arts. But the situation changes drastically when even after ten years the people didn't come back, and time remained stopped.

And personally, I really liked how the relationship with the heroines turned out to be. Although it's a shame that only the marriage with the first wife was portrayed. But some interactions with the FMCs were portrayed in the after stories and they were amazing.

Supposedly the 'monsters' are immune to the original rules of the world (physics) in that they are supposed to be immune to human innovation and science, being the fantasy creatures that they are. They even explicitly state that not even nuclear weapons would be good enough to stop them. However, the MC builds a pile-bunker (well within the reaches of human understanding/knowledge/physics might I add, nothing magical about a damn pile bunker) and uses it to easily squash and one-shot high-leveled mobs

MC spends only 250 years to read every single book in the world. On top of this he traveled to every country in the world and just about learned every single language. You have to consider that, even if this was possible, you'd have to be some kind of freakishly fast speed runner with a perfect memory and a incredibly powerful comprehension (i.e. You basically have to be a genius). Despite this though, the MC still acts somewhat braindead at times and you often question how smart he really is.

What's also hilarious is that he spends an additional 50-100 years learning how to be a blacksmith, because apparently forging swords trumps nukes. And apparently, learning how to become a master blacksmith takes a quarter of the time it would take to learn all the languages, read the books of, and visit the countries of the world.

There is no explanation, or hints about why the MC was left behind and thus unable to learn how to control mana. There is no explanation why the angel that visited him could not teach him mana control in his own world, or why building up his body when even nuclear weapons supposedly won't work against these mobs, what is a karate chop or a round house going to help? Basically the MC memed his way into becoming a proverbial Chuck Norris and now somehow he can compete with people that have powers that allow them to surpass nuclear weapons (checkmate, Gandhi).