And I'll also note that amongst my reasons for not using Reddit much at all:
The tools suck. Mod, posting, discussion, all of it. I've written about this for years. And at some point even my dim brain has come to realise that sites / services which haven't changed glaring deficiencies in all likelihood never will. (Hello, Google+, Ello, Diaspora*, ...)
The most active sub, /r/dredmorbius (and yeah, that's what my avatar here represents, something ... I really should change) ... has itself been both all-but-inactive and highly Reddit-critical for 5+ years now.
The discussions ... just aren't useful. Some subs are good for generating suggestions / surfacing content, but I've generally got much better ways of doing that now. Mostly traditional research methods: reading books, tracking down bibliographies and citations, that sort of thing.
Uninformed / manipulative / abusive chatter ... #AintNobodyGotTimeForThat
(This from someone who's online presence dates to Usenet pre-Morris Worm.)