Last month I deactivated my Facebook and have yet to turn it back on. In the months prior I started finding alternative sources of news: NYT, Pitchfork, HN, various sub-reddits, Bandcamp, what have you. I outsourced social media to Twitter and Instagram. I outsourced messaging to text/Slack. A bunch of my friends have done the similar things in the last few years.
The lower levels of cognitive dissonance are noticeable. It's not like Facebook has a monopoly on the things I hate: notification spam, stupid arguments, unfulfilling articles, and vacuous political rants all exist elsewhere. Maybe it's the dissociation between who a person is and what is posted. On Reddit you don't know the person and they don't get a big platform to express themselves outside of the comments. On Twitter you can't go on these huge rants and following/unfollowing people is fairly impersonal. On Instagram, you never get "why haven't you posted?? come back!!" notifications. And news sites do what they do best - deliver the news without some other third party getting to give their doctoral thesis on what they think it means.