Well, you tell me. In which universe was Kaido told to dodge Zoro's attack while eating countless from Luffy?
Zoro wasnt serious in the opening shot. The moment he became serious both Emperors are freaking out and making sure to dodge Zoro's attacks while they casually eat Luffy's attacks from his strongest mode, lol. Luffy has never been in the same ballpark as Zoro.
Kaido didnt need to dodge Kiku or any other Scabbard, he needed to dodge Zoro. "I came here to cut Kaido into pieces!"
Crying about it is pointless, betting against Zoro has always been a losing game. Luffy is lucky that Zoro is on his side.