@Adokun
Haven't seen the anime cause of what people said. Is it as bad as Overlord?
From what I remember they skip many information that explain MC behavior and just let the badass one.
Remeber the chap where MC fight his classmate whith the prof ?
In the manga, classmate is obioulsly trying to gain pity and didn't remorsfull at all when he pledge his loyalty to MC but the anime skip it and change his face to be more normal, the prof have a point when she said MC didn't have to kill him in the anime.
In the manga not, I remeber that because that was a big flag, even if I just read it once I remember the classmate as "insane character" but he doesn't look like insane in the anime. I guess the anime just try to make the storie less dark.