Mostly it seems like a barren wasteland for socialization, and I don’t follow brands. Whats left are christmas party invitations, baby photos, and messenger.

I find myself intensely disliking my neighbors if I’m on it enough. It feels dystopian.

Don't forget Birthdays! Make sure you give the smallest amount of effort to everyone to recognize their birthday.

I use messenger and groups. It's fine. Any troll gets blocked immediately so the experience isn't too bad but I don't use it like I did at the start any more. No sharing with family (all on whatsapp) or friends (also whatsapp, signal or telegram). Sometimes I share images on instagram too and tend to keep up to date with my friends lives (in a superficial way) there.

I'm a bit like you. I use fb exclusively to take part in groups (such as my cycling club and some local interest groups). Zero friends, just a feed of groups and pages I follow. I find it useful.