After reading all available chapters to this point... I'm dropping out.
He becomes OP by simply doing a training montage, barely any amount of time has passed but he's already surpassed a post game boss in terms of magic rank, his past only hinders his progress for a few pages until he is able to move forward at gigantic steps with ease, and to make matters worse the art is very amateurish and the paneling is confusing during action scenes.
This is bad. I'm dropping out.
Bye.