"Incel community" is obviously terrible and people that consider themselves a part of "community" centered around failing in some aspect of life are always shitty by definition. If you believe your defining trait is some kind of failure, you really have some problems with you.
Healthy people form communities around some kinds of their positive aspects or hobbies or views. Healthy communities center around hobbies like writing, drawing, music, sports, whatever. You know it's a sick community if it's centered around failure.
Now, individual people that just are incels, and don't really feel associated with any kind of community like that, are another story. Obviously they differ from one another. But those that feel a part of such a shitty community are obviously flawed in one way or another.