Zoro "damaged" kaido as much as the akazaya did, first true damage kaido took was from ACoC luffy attack
Both kaido and big mom talked about oden's haki inside enma hence why linlin told kaido to dodge
Kaido MOCKED asura by saying that to a guy of Zoro's lvl, that should be enough.
Base luffy split the sky with kaido, base zoro need three power ups + mink medicine to defeat one trick pony non conqueror non awakened non advanced haki NEGGED by base forest logia gimmick reliant king