In the end, not utilizing Kishibe, Quanxi, and Reze—or not being able to—seems to be the reason why Part 2 failed.
Cutting ties with Part 1 and introducing a fascinating new protagonist like Asa to take the story in a completely new direction was a truly brave and brilliant move.
I absolutely love Kishibe (the strongest Devil Hunter), Reze (the first love), and Quanxi (the first Devil Hunter). But hey, if the author chose not to utilize them, so be it. The real problem, however, is that Part 2 feels less like a complete, cohesive story and more like just 'an attempt'—an unfinished attempt, to be exact.
If the narrative had been solid and compelling, nobody would have cared whether Kishibe or Reze were there. But since Part 2 became such a mess, it leaves a huge void in the story. Where the hell is the 'strongest Devil Hunter' and what is he even doing? The control is broken now, so where is the Bomb Girl and what is she up to?
I read Part 2 again today, and it honestly just feels like 'Goodbye, Eri' set in the Chainsaw Man universe. Instead of a proper 'sequel' to Part 1, it feels more like watching a personal 'experiment' or a 'deconstruction show.' That’s why, despite the charming characters, I still can’t view Part 2 as a complete, fully realized story.
If it were a true 'sequel,' it should have naturally addressed the whereabouts of Kishibe and Reze. Am I just deluding myself? Is this just fanboyism? Seriously? Does it make any sense within the story's own logic for someone as charismatic as Quanxi to exit so abruptly and pointlessly? This is nothing but a 'deconstruction show.' Part 2 is just too weak to even be called a 'story.' And since it feels completely intentional on Tatsuki’s part, I view Part 2 not as a well-made sequel, but as a 'deconstructionist experiment show.