I've managed to wean myself off reddit almost completely. When I use it, I use the 'old.reddit.com' ui. When they eventually get rid of that, I reckon I'll stop using reddit completely.

I browse the main page and one or two subreddits without an account and this helps for me. No account means no way to comment or interact and this greatly reduces time spent on the site. I just check for anything interesting, and then leave.