This is me. As I write to you from my Graphene Pixel 9. My first non Samsung phone since the S3. The S22 unwanted ads were just too much. (and apparently it's all worse now) You could disable them, but you had to re disable after every update. The second I found a good deal on a pixel I jumped.

I used to only buy Samsung phones.

Now they're the only phone I've ever returned. Never touching their shit again.

This happened to me with my Xiaomi, I get notification ads from Xiaomi GetApp, their own app store. They even force open overriding google play when I press update on a third party app. I tried to block and force stop but they still pop up. I got so fed up I blocked them from using data and wifi; that did the trick.

You can mostly disable them. Delete your Samsung account, don't agree to their terms of service besides the most basic one or two that is required. No defense of Samsung, just what I did to deny them as much as I could of my information until I replace this phone and never buy Samsung again.

I will never buy another Samsung phone or tablet.

Same