Not "very far left" as in socialist / communist. "Very far left" as in "a large and vocal majority of liberals and progressives" which, when combined with the general Reddit tendency to groupthink and mock/attack opinions that aren't the subreddit status quo, make it a very uncomfortable place to be. (And I'm on the left!)

This just demonstrates how far the Overton window has shifted in US discourse if one views HN a hive of "vocal majority of liberals and progressives"

My comment was regarding Reddit, not HN. I would characterize HN as left libertarian, in general.

Let's just say that if you got all your news from reddit, you would be very surprised that conservatives anywhere ever won an election.

that really depends on which subreddits you're in!