It is not surprising that a community that associates and labels itself with a negative aspect of themselves would devolve into an irrational and hateful space.

So, a community about depression or addiction is doomed to devolve into irrational hatred? I don't think I follow your logic here.

“Involuntary” means against one’s will, which in this context implies an entitlement to sex.

??? I definitely don't see how "involuntary" implies entitlement. It just means you want it, but for one reason or another haven't been able to get it. Entitlement reflects the attitude that you deserve it, which I don't think the term implies.

As for your characterization of the group, when I visited the subreddit years ago, I saw posts from men complaining about overwhelming anxiety stopping them from approaching women they were attracted to, feelings of low self-esteem or body/facial image issues, and even disabled men trying to contend with how their disabilities limited their options. You're probably right about some of them, but definitely not all of them.