The problem is that you can’t take it away. If it’s not fb it’s tiktok, or youtube, or instagram, or reddit, or HN, or emails, or rss feeds, or food, or video games, or …
Is the question: which of these is not like the rest?
Furthermore, you deny two things: firstly, that the influence of facebook is real, and secondly, that other forms of (social) media can have a different effect. E.g., RSS is totally unlike facebook. And let's ignore you mentioned food.
> completely disgusted about what I've done
Sorry to hear that. I sometimes eat out of boredom/anxiety too; it's almost unavoidable. Don't feel too bad. It helps me to simply not buy the things I like. You do have to do your shopping every day, though.
But remember: this internet stranger isn't disgusted by you.