This is honestly a tough one, I cannot decide which is worse, but I probably would pick Wano, usually the last arc of a series rarely, VERY rarely ends up well, the story ends, and people’s theories/headcanons fly out of the window, opening them to analyze the series with scrutiny.
Wano is not the final arc, and yet, the Joyboy’s twist has robbed me even of the goodwill to theorize on what other potential good things might happen to me, that’s quite the achievement, I don’t remember this happening when I was bored with the quincies, on when Obito was screaming “Rin” like he was going to Epstein’s island, there were still other things that (potentially) could turn out good, One Piece, now? Eh. It’s impossible for people to turn on Luffy to begin with, so nothing, we’re really on a clown tour.