Why is yelp allowed to exist?

If I don't want a google business profile, I can delete mine (or simply never create one) and that's it. But if some butt-head that has a personal beef with my wife wants to, he can "create" my business on yelp and leave me a totally fake 1 star review without any proof whatsoever and I can't do anything about it. This is legal? This is allowed? This sounds insane to me but lawyer's aren't cheap! Has anyone ever created a website dedicated to slandering yelp? What can they do? As long...