%50 because of Kaido, its not wrong. Zoro was getting help from 4 different people constantly don't make excuses about Big mom.
Luffy's FS CoO told others to be ready for Hakai, Zoro acted only because Luffy warned them. Without Luffy's FS, Zoro couldn't react.
If not for Luffy, Zoro would be dead meat after Thunder Bagua.
Luffy told them to leave because others were too weak to keep going. Too much difference. Zoro can't even knock Kaido down with his ultimate move Asura while Luffy does it with regular punches without G4.