When I was there, it was a cesspit of open misandry and hatred for poor people while everyone patted themselves on the back for how Woke and inclusive they were.
Metafilter peaked around ~2010 but the quality really went down after the 2016 elections. Months of endless posts about politics and the general change in tone too made me quit, never looked back.
You’ll want to avoid Metafilter unless you’re interested in narrow discussions hemmed in by a very specific and limited ideology (think: Foucault, Marx, academia, etc): https://www.metafilter.com/guidelines.mefi