But you DO have a PhD. Claiming it is somehow not valid is a criticism of the establishment that awarded it to you. You're just suffering from impostor syndrome, that's all.

Also, no employer will consider someone fresh out of education, even someone with a PhD, to have vast quantitites of useful real-world experience, so even declaring a PhD won't see you land your first job with the expectations that you'll ace every bit of it from day one.

It's good that you realise you know nothing. That is both accurate and useful. But don't take it too far. What your PhD proves is that you have an ability to learn, understand and communicate, and THAT is what employers are looking for.