Same. Overall, I'm happy with my iPhone, but not having an actual browser with an actual ad blocker (uBlock Origins) is really painful. I've had to live with ProtonVPN's ad blocking, but that only prevents sites from loading, it doesn't hide the actual ad links...
Maybe, but Safari has a dogshit UI and I much prefer Firefox over it. I despise the fact that they don't let other browsers use their extensions, though (even though they're forced to reskin Safari). I'd install AdGuard on Firefox if I could.
I use 1Blocker for which I bought the lifetime license on my iOS Safari, as well as adGuard DNS blocking running on my OpnSense at home (WireGuard automatically connects my phone to my home network via VPN as soon as I leave my WiFi)