I think you’re being a bit unfair there. These attitudes often stem from their inability to form relationships. The struggle came first, and the resentment followed. They aren’t without sex and relationships because they’re inherently hateful people; rather, the hatred emerges from prolonged frustration and rejection.

In most cases, I believe the inability to get into relationships is less about character and more about factors like social awkwardness, lack of friends, poor hygiene, unfortunate genetics, spending too much time online or gaming, etc.