The linked thread is mostly garbage for the simple reason that many of the people in it clearly don't know what "left" means, so it's an eclectic mix of vague but mostly correct critiques of leftist groups and people who are talking about the Democrats (including likely OOP, who defensively assures commenters "they still voted").

Edit: elsewhere in the thread, OP says "Leftists consider liberals as very non-serious", so it certainly seems like OP is a radlib and not a leftist. As purpleworm pointed out, very suspicious to title the thread "any leftists" instead of "non-masking leftists" or something similar.