Poor mental health among “liberals” (leftists) is no surprise to me. I think much of the problem starts with leftist teachers.
Put the blame where it belongs, on parents. People institutionalize their kids from infancy. Right now a fancy daycare ( they call them schools these days) is going up near me with a sign that says it’s program is for 2 year olds on up. Other people put even younger infants in institutions. No wonder the kids come out damaged.