Antinatalism is the only answer. These people never asked to be brought into the world in the first place, but they're suffering for it. And are victim blamed under the guise of "accountability" despite that not holding since the relationship isn't voluntary. It would be like slave owners holding their slaves accountable for trying to escape. Yet the majority of society would disagree with that kind of "accountability".
Nobody even needs to make a claim of their own to prove this. The basis for the laws and morality of society aren't consistent. When I see instances of a child killing their own family, my thoughts about the parents are "Well, that's your fault. This shouldn't have even made the news".
That logically falls under the parent since not only have they created more suffering by reproducing, but have also created more suffering for themselves, though according to the morality that society supposedly upholds, that logically takes a back seat since the decision to reproduce was their own.
A lot of the moral arguments that are made against these people go out the window the moment "I never asked to be born" is said. The involuntary relationship between parent and child, between that child and society, the child having to endure that hardship of the world despite the lack of consent to participate in the first place contradicts the NAP.
The one responsible for all of the suffering the child goes through as well as their actions logically fall under the parent since they brought the child in the world due to their own desires.
Though this all goes out of the window in nature though since rights don't exist.
Without getting into whether these individuals are justified or not and just arguing from raw logic, I say "What do you expect to happen?" Society perpetuates the problem while simultaneously complaining about it. Though it dodges a solution due to cognitive dissonance, apathy or because said solution doesn't align with their self interest(Antinatalism going against the desire to breed).
The world will always be hell to a large number of individuals due to discrimination like lookism, lack of resources due to competition, not having the genetics to compete etc
"Incels" are going to keep popping up, so purging them from the gene pool doesn't even make sense. The parents of incels weren't incels themselves.