The story has a lot number of issues, from the confusing motivations, to the ridiculous expanding scope of the antagonists, to the fact that Lisa constantly beats MC like an old rag, but really the biggest one is the bloated cast: People brought up early on will frequently pop up after hundreds of pages, make a short cameo for drama or something, then vanish again before you even remember who they are. And that's if they're lucky enough to be brought up before at all. Halfway through we have people who are just given a short backstory in the very chapter they're first introducedto us, all just so we have an antagonist with "motivations" who's "different" from the canonical nobodies that the story keeps throwing at the main cast to fight.

If half the cast were cut, the story might have had time to develop, and we might have gotten a less rushed ending. As it stands, I don't know who anyone is, what anyone wants, or why the overarching plot even matters. Other than that, it's a battle manga. You see bad guy, you punch bad guy. I wouldn't call that part of it incompetent, at least.