FWIW, I just do this by never going to the feed. Ever. I open FB on my messages, check my handful of groups (who I sure wish were on forums, but aren't...) and never see the crack flavoured candy.

Also, a wonderful tool is Stylebot. You can make CSS overrides to hide auto suggestions, "you might need this dopamine rush", "other addicts got addicted to this" and all that crap. Makes reddit actually usable.