I assume they’re mostly still kids, because everything is black and white and can be solved without any nuance at all.

This is SO important. Remember that the "Dirtbag Left" a la Chapo et al. was created when the Alt Right was running rampant in high schools. Their goal was to attract young people to the left. Which is great! There's a place for cringe edgy teens to feel like they can fight for a better world. But I'm really not looking to hang out with arrogant teenagers right now, and definitely not with their emotionally immature adult chaperones.