What's the Problem With Post-Modern Philosophy?

There are quite a few post-possed modern theories and philosophies. And what they have in common, like performatism and metamodernism is that they are solving that problem of post-modernity. So everything is being relative and you don't have a frame of reference. But if the action in the world invalidates the theory, then we have to return to the drawing board. It's never going to be 100% correct but it just has to get you to where you're going.