Because they’re “trapped in the wrong body”, at least that’s what we’re told. Because they’re the product of a broken educational system, failed nuclear families, and progressive-dominated culture and media - would be my guess.
A huge factor is the nihilism taught by the eco priests who preach "we have eight years left, then we are all going to die when the earth burns to a cinder."
Liberals are drowning in a sea of reality. They just don’t understand reality and are acting out against it.