Now that women have a choice about whether or not they want to mate with someone, and who to do it with, they’re being a lot more picky. I’m pretty sure the most women can sense when men hate them, and these guys aren’t very good at hiding their actual personalities, either.
They just hate women, and use being an incel as the excuse for why. They’d still hate them even if they got all the sex they wanted, after all, any woman who would choose to sleep with their worthless ass, can’t be worth anything, either.