Reddit is an echo chamber. Almost nobody contributes to the conversation, but they sure are quick to exercise insecurity for very minor things. I deleted my account there last year and life has improved as a result.
I agree. It's my opinion its become toxic over the past few years. Generally speaking I prefer unmoderated discussion forums. I rather choose what to read instead of being "protected".
This is interesting because the least toxic places on Reddit are highly moderated (askscience, and askhistorians are the two biggest examples). Indeed, Hacker News is just essentially a highly moderated subreddit, which is its attraction.
HN it may have pretentious articles, the comments are the most substantial. Lately I've been lurking through HN Classics (1) (Many research papers and pdfs posted on HN that are old) and the comments are the best part of them.