I believe 99.99...% of interactions on Facebook are positive. They are friends and family keeping in touch, posting life updates, organizing events, hobby/support communities etc.
Most ads are normal ads from legitimate businesses including a lot of small and local businesses who find it very valuable for reaching their customers and growing their business.
The recent rhetoric and news coverage acts as if Facebook is entirely full of fake news and echo chambers and political manipulation when the truth is while that stuff is happening it's a minuscule percentage of the billions of posts per day.