I don't get AI spam, but I have started getting recent news articles, generally starting from ~the end of page 1 and getting more and more common as you go further down. i find they contain maybe one word from my query in the title- so it's not just pulling them out from nowhere, but come on surely it can do better than that...

I switched to a different search engine (brave) to get away from it, the result quality seems about the same for english, but not as good for other languages- it's not amazing but it'll do