And as I said, luffys 1000 random attacks against zoro's ultimate moves at the time isn't a fair comparison. We would have to compare King Kong gun to zoro's Asura for that to be a fair comparison. And even after Zoro did those attacks, kaido was still standing with plenty more left to give. That is also the case for luffy too I guess.
Also, if you want Kaido's vocal/visible recognition, just look at the first attack luffy landed. RedRoc shook Kaido to the point he was comparing luffy to top tiers.