This is common with many websites. The site knows I'm on a VPN and just won't allow me to connect. More and more websites are doing this making a VPN unusable.

What? Stealth is just a method to connect to a VPN server, that's it. Services only see you connecting from the server, not how you have connected to it.

Thanks for raising this—it's definitely frustrating when a feature like Stealth Mode doesn't perform as expected, especially when Google's detection seems to have evolved. I've noticed similar issues with YouTube and CloudFlare blocks, which undermines the whole point of a "stealth" protocol. For anyone who relies on precise configurations or needs to double-check technical setups, having a solid reference for calculations can be surprisingly useful. I always keep Geometry Formulas bookmarked for quick and accurate mathematical references. Hope Proton VPN addresses this soon!
https://geometryformulas.study/

I also see some websites blocking access via CloudFlare with all protocols getting blocked.

Stealth mode is used to bypass blocks in your network, not something where you wanna go, steal exist, just to bypass restrictions like censorship in countries

In theory, whether or not you use privacy mode only affects your own traffic and won't affect how Google sees your traffic. Google technically cannot know this; it might be your misconception, or the server IP configured with privacy mode might just be under Google's risk control.

It does this with or without a VPN but it should be improved 100 percent

Is it doing the same with non stealth connection?
Because it's seems more like an exit point problem than the protocol used.