Yeah, that's how I understand the mentality that's common in the incel community. Like I said on the first few pages, I have no deep insight in their community and have only drawn some knowledge by looking into their stuff when they first entered the news, but that's the picture that I saw painted. People who resent the fact that they're, in their mind, physically not attractive, and as a result think they have little to no chance to find a partner.
I very much think that this is a false assumption in regards to most people, and that most of them could probably find a decent partner if they put some effort into self-improvement (partially to get their mind out of seeing themselves as such negative characters), but I do think there are some people who whom it is probably true that they have too many "unchangeable" characteristics (not only the psychical attractiveness, but also things like a person's voice, actual disabilities, etc) to them that saying that they realistically it is not highly likely for them to find a partner with whom they could be happy for the rest of their lives.