For instance the MC will win this or that battle by doing this or that, or the MC was still kind hearted but after being betrayed he will turn into a monster etc etc

For instance a female elf has been kept as a captive by humans for about 200 years while being r*ped/abused for almost all of that time, her home was also burned down and her family/race mostly butchered by humans but when she meets the MC (who is also a human) and is prepared to become his s*x s*ave to protect the other female elf s*aves (she was even abused/raped to such a degree that she had become someone with split personalities before meeting the MC) the author even spends a whole chapter to tell us about how bad of a life she had. But then MC say's your free! So she breaks down her split personalities becomes one again and almost instantly proclaims her loyalty to the MC and becomes one of his most trusted general within just a few sentences and then also makes all her elven sisters follow her and they become one of the MC's most trusted archer company, which the author tells us by spoiling the future shortly after.

A spymaster is introduced fairly early and wow the dude is pretty amazing in a world without magic, technology around the iron age and only one spy in the city where the MC is at well the spy that is stationed there is pretty OP I mean everything the MC does from the secret plan making talks to his everyday life everything is recorded down and sent to the spymaster in no time. For instance when they are to be attacked it takes at least two weeks for the army to walk that distance if they barely rest but for some reason the spy is able to send a complete detail of the MC's battle plans to the spymaster within 6-7 days at most, who then in turn hands it over to the general leading the attack.

During the major battle where the MC has some 1200-1500 soldiers with only weapons and almost no training in how to fight as an army while going up against an army of 7000+ elite soldiers fully decked out with spears/swords/armor/shields etc they manage to get a decent hit into their flanks but does no real damage they start shouting that they've won and then the elite army who is being lead by the strongest general their country has ever had and that is about to crush them just instantly crumbles. I mean there are more then ten chapters dedicated to this single battle showing of both sides strategies and how the battle turns out but then when the bad side is about to crush them the MC just screams out you lost! And then the super elite army just crumbles. Cause the author say's their morale broke since most of them turned around to see what was happening and couldn't see clearly so they all decided to flee for their lives. This really felt like some deus ex machina sh*t cause the author pretty much realized that they had made their MC and friends to weak and couldn't think of a way for the to win so they just went with, oh the other armies morale broke so instant win.

There are other things as well but yeah getting a bit longwinded here.

So, the first chapter starts out with the main character getting transported whilst in his home. Afterward, he appears in an underground temple to a quote-unquote "Evil God" worshipped by heretics. After the heretics are what I would consider carefully introduced by the author with a good amount of detail, the author then kills them off, basically pulling a bold move as if the story were Game of Thrones. From there, the rest of the chapter is kind of used to world build, leaving the reader confused as what came about the MC while everything went down around him.