Proton uses privacy as a selling point and they deliver on it by providing you with a private email service.
If you would like to assert that they’ve broken some kind of promise they made to you in regards to privacy, then yes, you have to provide some sort of proof of that claim. If you believe that you don’t, it’s you that appears impossibly dumb I fear.
If you have a point to make about their marketing practices, then make it. If you can’t articulate a single problem you have with Proton then you’re just yapping and can be safely ignored.