Power users don't watch ads, as they have ad blockers.
2. Ban any site that shows different content to the Google bot vs the user. (looking at you Quora, with your login required to read, Pinterest...)
3. Ban all the myriad of sites that do nothing but list out every possible phone number or random words. AI should have no trouble detecting those.
4. Ban all the sites that do nothing but copy content wholesale from other sites. I thought they had a duplicate content penalty, but it doesn't seem to work.
Do those simple things and you've just made Google search 10x better.