For now I will say:
1. Top 1, highter than others...Luffy, I hate that every chapter include him, and fact that only his fight wasn't skipped, even vs fodders, i really hate him for that;
2. Chopper - useless garbage, that even didn't play a role of doctor for now;
3. Robin - I don't hate her, just consider her boring, and I don't like what Oda doing to her, especially her clash with Younko. She has to struggle, not chilling, case she is not that strong;
4.Wano arc - worst arc ever, for now at least.