If everyone disagrees with you, what does that say?
It's due to the unique position Zoro has in the show.
He has portrayal with both Luffy and Sanji, leading to natural fights with both their fanbases. Law/Kid are also two characters with some portrayal with Luffy, similar to Zoro - a conflict between these fanbases are also natural.
Now, when you consider that aside from Zoro, Luffy/Sanji/Law has the biggest fanbases with the series, you'd understand why it's a very natural thing that Zoro fans fight with most of the fanbase lol.
Coming to Luffy, only Zoro and Law (to an extend) has any sort of ground to stand on when compared to Luffy, via raw feats. So, Luffy fans only have to deal with Zoro and Law fans.
Kid fans don't fight with Luffy (cause it's an utterly laughable prospect), but you do see some Law fans fight with Luffy fans, just not to the extend Zoro fans fight with Luffy fans.
Sanji fans only have to deal with Zoro fans mainly.
Law fans only have to deal with Zoro and Luffy fans mainly. (Kid fans too, but they are mostly non existent lol)
Mihawk is a top tier who is neither yonko nor admiral, but has a true rivalry with Yonko Shanks (like Roger/WB). It's again natural for Mihawk fans to fight with Yonko (espeically Shanks) fans and admiral fans, in the same way it's natural for yonko and admiral fans to fight with each other.