Start by kicking Google. This is a problem largely of their own creation.
Why? Simple. Instead of having websites to provide useful content, or to sell actual things, they slowly turned into sites that used paid embedded advertising for financial support. Is it in any way surprising that a few years later we started to see websites appear whose entire raison d'être was to carry adverts to make the owner money? And now, we're seeing the next logical step, using AI to rip off content to make a site superficially good enough to warrant being found by a Google search, but in reality it exists just to punt adverts to make money.
It's a lot like the adverts in Android apps. Once, you had little embedded adverts at the top or the bottom. Then along came full page adverts. Then full page with video. Then full page with video that can't be skipped until some time has gone. Then full page with time delay video that leads to another full page with a time delay and a static GET button. Just yesterday I saw one for, I think it was Alibaba where the close button was fake as was the "Not interested" button, tapping anything would toss you into the app store.
Google make their money on the adverts and probably count this fakery as a successful click, so they won't give a shit, it's all money to them.
As long as our "guardian of the internet", major mobile OS and browser creator, and prime advert flinger are one and the same, this situation will only get worse. But who has the money and resources to wrestle Android away from Google and try to make a less shitty ecosystem? It's a serious question, because my most recent Xiaomi phone has small amounts of advertising stuffed into the system apps now (like the file manager).
The real scourge is not spam, or AI, it's everybody being beholden to the quick and easy cash offered by embedded adverts. It's that that is shittifying everything.