I guess what threw me off is the combination of them having fought the most dangerous criminals several times by now, yet still going to school, which just doesnt make sense to me. Had they clashed with minor criminals and maybe a middle-dangerous villain for the finale, that would have been okay. But no, they literally fought the MOST dangerous villains in season 1 and then again in every following season. To help make you understand: Imagine an isekai anime that starts out with the hero party fighting arch demons and elder dragons - only to spend most of its time at an adventurers' academy where they teach the same hero party how to properly fight slimes and bunnies. That's what BokuHero feels to me.

And mixing it with my watching of other series that do the whole "one year per season" thing, although I can't think of which series I'd be thinking of here rn. Was it an anime or us show? Not sure.