Imagine it from our perspective. A thing you love keeps going on, getting deeper and more exciting. The fact that it's so long is a positive to those who love it, but a hurdle for everyone trying to get into it. Much like life, One Piece is about a journey, not an ending. Blue Lock is great, and I'm happy you like it, but the most meaningless burn on One Piece is to say it's long.
Call it a braindead pirate story with shit pacing instead. Or call it's artstyle shit.