How?
I became member of all sorts of group: Buy-N-Sell in my local area, technology groups, 10+ DevOps groups and so on. The quality of posts on these is poor and is irrelevant for me for the most part. So every time I used to open the app out of habit, I would see all non-personal crappy posts and I would close the app in under 10 seconds. Over time my mind hated using FB and clicking on that app went away from my muscle memory without me trying to force any habit changes.
Why not just delete the account? FB is still great to find old friends, ex-colleagues who I might have lost contact with. I also use it as my public mic to post stuff that I want to share as widely as I can.
It's fun to take on the PMs who design addictive products that influence us at psychological level and beat them at their own game. Bring it on!