When I was in schools nerds understood they couldn't compete with the popular boys for girls. Now, they don't. They've been told they are equal to other boys in EVERY way and it's simply not true.
When it comes to the dating scene and sex, nerds and incels take the back seat. Problem is, they think they should be in front because teacher and mummy and daddy tell them they're a special snowflake who is equal to others in every single way.
That's where the misplaced anger comes from - reality, biting them hard.