No half measures.
I deleted my Reddit and Facebook accounts back in July and August respectively. I quit Reddit because they don’t do enough to fight blatant racism and misogyny. Also I was wasting too much time on the site. Thirdly, I found that the anonymity often encouraged mean or disparaging comments (though, to be fair, there were just as many clever, helpful, and/or friendly comments).
I quit Facebook because 1) I was seeing too many posts from random people I didn’t know, 2) my time on the site wasn’t strengthening or enhancing the relationships I cared about most, and 3) I wasn’t enjoying time on the site. Also because of various privacy violations.
So I went cold turkey. Nuke option in both cases, account deleted, no going back (unless, of course, I decided to go back and start from zero karma and zero friends, respectively).