Yeah - I've just been reading some of the Pinterest engineering blogs linked above about their sophisticated SEO experimentation framework and ugh, I think it's time to load up my browser with extensions or move away from google completely.
Image search has been borked due to Pinterest results for a few years now, but now my text queries have also started being dominated more and more often by their search results. I'm bummed that Google doesn't count the different Pinterest country domains as duplicates and remove them. instead there is like pages upon pages of the same Pinterest result.