I'm no facebook fanboy by any measure. I miss Forums, but everyone moved to FB groups. (at least 90% of the people/content). I am on FB, I manage my FB feed. I unfollow/unfriend "crackheads" as someone else called them. I only follow people that mainly post their own content, not forward shit, or post news etc.
I was mainly there to share public "stuff" with my remote family (both parents were 300-600 miles from us) and we had a young child (both parents first grandchild).
I now mainly use FB for groups of my interest, because that's where the people are. I also sell stuff on FB market place, because craigslist is a ghost town.
Between managing my feed/friends, using 'social fixer' browser extension and Pihole I rarely see ads on there. Certainly not on my PC. The the App can sneak in some, but I hide/report any ad I see.
It works for me. I don't live on there by any means but go there for interest groups.
You would think nearly half the voting population would agree and not support those that do. But here we are. Boggles the mind.