What encounter with Ashura? The one panel encounter where its not even clear that Kaido is blocking or fighting with Zoro?
Yeah, thats not solid proof.
Keep coping. You are denying manga panels to push a headcanon.
It wasn't one panel either. It shows Zoro besting Kaido in close combat. Lots of panels have been posted showing that Kaido was trying to hit Zoro and Zoro blocked all those hits and landed his attack.
Marco already fought Big Mom in close combat.
Same Marco got beat by King
Meaning King will perform better against Big Mom than Marco...hence perform well against Kaido
Add the fact that King's durability surpasses Kaido's and your point becomes completely baseless.
Find another way to downplay Zoro