Ideally, you don’t go anywhere. You talk to those assholes and degenerates and try to understand them a bit better and maybe even try to make friends with them (yes, yes, crazy idea). They are your fellow citizens, after all.
From over here in Europe, questions like this really make America look screwed. Let’s hope it’s not.
Seafile is not FOSS, as I understand it. But I tried it anyway, since I also found Nextcloud bloated.
In the end I went back to the purest strategy of all: peer-to-peer. My files are synced between devices over the local network using
ssh
,rsync
andunison
and never touch an internet server.