I was amazed how well it worked to get off Facebook by removing the button from the phone's home screen. First few days it was weird - when between things I grabbed my phone, unlocked, moved my finger to the palace where I expected Facebook and then was confused "what was it I wanted to do? - oh nothing, damn" and after a week or two I got used to it being away and was mostly off Facebook. Now I use it only when specifically searching for information which (unfortunately) is exclusive there (for some businesses it's simpler to do a FB post than their own thing ...) and when I scroll over my feed quickly think "oh what a waste of time" and am happy for getting past my "addiction".

Won't say it works for everybody, but certainly worth to try. My life got better.