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.

> The subreddit is definitely biased against men, but I don't know if it's representative of society at large.

Perhaps not in general (I don't know either way), but in the specific case of domestic violence, there is absolutely a societal bias (US perspective, here) against men who accuse a woman of domestic violence. In many places it's even considered "funny" that a man was "hurt by a girl", to the point that a man would never even consider reporting something like this.

Unfortunately, it's of course not all roses on the other side: while people certainly believe in the abstract that women experience domestic violence, there's still often a lot of bias against specific women when they accuse a male partner of domestic violence. ("But he seems like such a nice guy, I could never believe he'd do something like that!", etc.)