I've also noticed that specific searching has also gotten terrible, by which I mean things like searching my email or google drive. I can't figure out why this would be since it's not subject to the same incentives as web search!
And, the really truly disturbing thing I've noticed: my email spam filter (presumably at least partly built on some of the same tech as search) is shitty now. NOT ONLY does it let through a billion "Free Tools!" bullshit ads, but EVEN WORSE it seems to file legitimate messages as spam more often now. I used to ignore the spam folder because the chances of it missing things was so low, but I've had to go through there so many times recently, and I just know I've had important emails be deleted.
Legitimately do not know what to do with this information because I don't feel there will be better alternatives out there, though.