I don't get any random pop up after I disabled the necessary items. My experience is also valid. Of course you find it unacceptable for the need to disabled them, it's your preference. Based on my experience, once I disabled the necessary things during the setup, ads is no longer an issue. You can of course complain about the aggressive ram management etc, That I got nothing to say.
And from usage perspective, hyperOS is very much usable once you disabled the items. Of course OOS is better, but I wouldn't discourage people from xiaomi phones just because of the ads since it can be disabled.
Everyone has their own preference. I wouldn't say you are wrong, neither do I think I'm wrong. Like I mentioned before, I have oneplus, xiaomi, oppo phones. I have experience in their OS.