There have been multiple complaints specifically not just from the SEO community but from normal searchers regarding the quality drop in Google’s search results since May 2020.
The most trending thread is at Reddit thread with more than 3000 comments on the thread. It states:
Recommendation: Google Translate Widget Is Now Free To Use For Some Websites
Google’s Aware Of Pinterest:
Websites Like Moz Q&A And Stackexchange Got Dropped:
Lots Of UGC Sites Got Hit:
There is a lot on the Reddit thread and it is expected Google is reviewing them.