Fascinating.
https://www.natesilver.net/p/what-explains-the-liberal-conservative
These say a lot too:

Not surprised at all
So, the tldr is that liberals really are crazy.
Largely Godlessness
Could be related to self agency vs expecting someone else (i.e., a government) to solve your problems
A lot of things changed during COVID. I stopped hanging out with liberal friends and largely stopped being liberal. Now when I see those folks again I just can't stand the sheer negativity. It's so utterly draining. Were they always like this? Was I like that?
I dunno the answers but this survey definitely tracks with my experience. I try not to be rude but the truth is I can't stand conversing with those folks anymore. Always have one eye on the exit.
It's not all my pre-COVID friends, but the ones who identify strongly as capital D Democrats. Lowercase liberals are fine. They seem able to live their lives and focus on the positive. I don't feel the urge to flee those conversations.
I wonder what the results would be if Trump wasn’t President.
Republicans in denial about their mental illness.
Democrats make it their entire personality which means they can never get better or they will be nothing.
Guess 2, the old adage that stupid people are happier.