Kizaru (like any top) is bound to be physically very resistant and + he is a defense specialist.
Sure, hitting him is a problem, but even when you hit him it's not going to be easy.
Sure, hitting him is a problem, but even when you hit him it's not going to be easy.
Hitting Kizaru would be as hitting Shanks. They are not oni and they are not as strong as Kaido.
However, Kizaru has insane speed that puts him above there. He also uses other stuff like clones and light attacks but this is not his main strength.
Oda making this fight Tom & Jerry is the best thing he could have come up for this fight because having a fast character continuously escape his opponent is what makes his main strength be portrayed the most.