I don't understand why Zoro fans are so upset. He had some really good fights and moments this arc. He fought Hawkins, Killer, Denjiro, Apoo, Kaido / Big Mom, and King. His captain is an emperor and he is the 2nd strongest member of the crew, he defeated the 2nd strongest of another Emperor's crew and got multiple powerups along the way. He's going to continue to get stronger as the series goes. What more do people expect? He's going to be around Prime Rayleigh level by the end of series most likely, maybe a little stronger. That's perfectly fine.