I've even had constructive conversation on Hexbear before
I'm guessing you didn't go against the flow?
One time I said it's fucked up that Romani children are taken away from primary school and married off to have children.
Within an hour, I had crazy fucks publicly screaming at me how I'm a nazi and advocating genocide. Meanwhile I was also getting private messages about how they're hoping I would suffer and some shit.
Plenty wrong with Ubuntu.