Becuase the one piece is 80% luffy and nothing more. Strawhats are completely weaklings. Most of them they don't have even haki and they have yonko captain. Zoro and sanji they took down yonko crew kaido and they don't know what powers they have. Only luffy evolved all these time. Strawhats are completely garbage crew. Only zoro and sanji fighting. The others or crying and hiding like usop and Nami. Or they are all time off panel like jinbe, Franky, or afk like Robin and brook. Chopper last time fought was in water 7. One piece should be rernamed to luffy piece. After fishman island the series is like dead to me. But money are good that's they still continue this parody. The series turned something like gods vs noobs. Even Roger looks like noob now. Every random is god now.