the category "incel" is a self-defined group. You decide you belong to it by saying that you can't get something that you think you have some kind of entitlement to. But sex is an interaction between two people, not a thing anyone deserves or has a right to. To act like you should be granted sex is to completely dismiss the other human being who's part of the relationship. Even if it's casual sex there's a choice made, consent to enjoy something together - nothing's being withheld if you aren't having sex. It's like not having friends or no one coming to your parties or liking your music. That's on you.

No one hates people who are born into a category of "incel" but if you define yourself as an incel, you are saying you're a self-pitying asshole who has no respect for women's self-determination. Kinda putting yourself in an unlikable group.

your list of why to hate other groups is pretty unbearably racist, btw, might want to tone that down too