The pacing is completely fucked most of the time, production quality varies over time (mostly because it's spanning a decade now) and I wouldn't recommend the show over the manga (which has none of these issues) aside from some key highlights, but I don't think I'll ever understand the disproportionate hate for the actual story of One Piece. Of the popular, long-running shonen series it has an original setting, a ton of world building and a romantic atmosphere. It's not for everyone, but it does take an edgy contrarian to act like it's dogshit with no redeeming qualities.