Have you investigated if the lsp and linter is configurable

From what I can gather from a cursory glance at the docs, zed uses intelephense and its diagnostics can be disabled. The whole lsp can be disabled. At the risk of sounding like I'm saying "you're holding it wrong", I have to say that this is an OP problem and not a Zed problem. These are sensible defaults that work for almost everyone, in my opinion.