Zoro haters are mad once again. They thought Zoro fighting King would make his rooftop feats irrelevant and put Zoro down a level. They though King was going to be weaker than Marco and Katakuri. Instead, King is stronger than both and receiving more hype. We don't even know everything about him.
Oda is doing the same thing with Zoro vs King that he has done with Zoro other battles. He is using Zoro to hype up his opponent who will then be used to hype up Zoro even more.