Key word is before.
Then he's face to face lifting his kanabo to attack Zoro as I showed in the panel posted.
So what you said was factually incorrect. Wasn't even a hard scene to understand smh.
Kaido was focused on killing Luffy,
had to twist his focus on Zoro quickly,
didn't fall to his knees
and was underestimating Zoro (shock face) around having basic CoC
After this shock a more serious Kaido, focused on killing Luffy, was speedblitzed and overpowered by Luffy to the point of knocking him down and all over the place. Next chapter when Kaido wasn't underestimating him they clashed evenly and fought for 30 minutes.
Serious Kaido>=Adv CoC Luffy (30 minute fight)
>Semi Serious Kaido (blitz and BTFO)
>All out Asura Zoro (couldn't make him go to his knees)
But apparently Zoro could somehow do the same or better than Luffy, despite comments Zoro made confirming that Luffy learnt "something" and that they could be confident in Luffy 1vs1.
ZKKers are clowns, who ignore manga fact.