Another problem is "resist fingerprinting" prevents some canvas processing, and many websites like bluesky, linked in or substack uses canvas to handle image upload, so your images appear to be stripes of pixel.
Then you have mobile apps that just don't run if you don't have a google account, like chatgpt's native app.
I understand why people give up, trying to fight for your privacy is an uphill battle with no end in sight.
In an adversarial environment, especially with both AI scrapers and AI posters, websites have to be able to identify and ban persistent abusers. Which unfortunately implies having some kind of identification of everybody.