The subreddit is definitely biased against men, but I don't know if it's representative of society at large. Reading the subreddit often feels jarring and alien to me but that may be because most of its users are American and the US has lots of social norms (especially regarding gender) that are nonsensical to me as someone who grew up in Scandinavia. On the other hand, I assume Reddit users are not very representative of the average American, and people who participate in a subreddit about judging social behavior are probably not representative of the average Reddit user.