Regarding quitting Reddit, I did it a few weeks ago, really easy process to delete your account (you can't delete old posts though). I quit for no other reason than I was just killing time there with few new things to discover, felt like I could find more productive things to do. Deleted my Instagram account for the same reason.
As for quitting Muffs, I've found just deleting any bookmarks to it reduced my visits to almost nothing, mostly a matter of breaking habits. There was a good year, maybe two (hard to say, I've been there so long), where I maybe looked at it once every few months just to see if there's anything new.
There's good info and friendly helpful people there, it's just in many ways overwhelmed by its success and the growth/success of eurorack broadly. I find I'm happiest with the experience there by just skimming the general gear/guitar fx/software forums for news. Ignoring most of what goes on there is the quickest path to peace. The bad faith developer witch hunts that crop up now and again are the things I find most spirit-crushing, even if I guess they serve a consumer utility.