I heard a long time ago that Bleach was getting canceled before Kubo wanted the series to end, or something to that nature, and he ended it unsatisfyingly out of spite because of that when there was much more story he wanted to tell. Kishimoto ended Naruto poorly because he stopped caring a long time ago; I mean that war arc is abysmal, and he wrote himself into such a corner due to his nonsensical power scaling that he killed off one of the strongest shinobi in that world's history to a lame ass backstab, then made the final boss some bitch from the moon. Those two things aren't the same lmao.