Get over it.
We’re in a fan edit thread. Not getting over things is the only way we can fix them. I think he should be allowed to criticize. Whether his criticisms are valid is another question, but you shouldn’t just try to shut him up like this.
In fairness, it’s not just that his criticisms are bad, but there’s no way to accomplish what he wants. In which case my suggestion is legitimately the best thing he can do.