It’s never not been mainstream. Crazy girlfriends, calling people psychos, joking about having ocd(“or as I prefer it, cdo!”), adhd squirrel!, calling people narcissistic, autistic as an insult for being overly petulant, “retarded”, etc etc. the list goes on and on.

At no point was someone’s mental well-being not a point of mockery or weakness in society, I think.

I don't think that this specific issue is "hate on people for their mental health" it's more that, mental health issues of powerful people playing out in headlines and prime-time media will never not be uncomfortable to watch, a tragic and unnecessary spectacle.