Sexually they're attracted to whomever is atop the social hierarchy, or is physically attractive by a very narrow definition. They are all lusting over the same 20%.

All of them. And yes they'll all settle with some schmuck, but he's never going to satisfy her desire.

This means a fierce competition, from puberty until mid 20s, where they're all attracted to the same few guys.

Inversely, men's sexuality draws them towards a very wide selection of women. And most men have different preferences. There's only about 20% of women who no one would be completely happy to end up with, compared to the 80% of men.

Men can collaborate, because they can all win.

Women can't collaborate, because only a few of them can win, and the rest are to some degree dissatisfied.

It's why they can't get along with each other. The distaste for other women runs deep in their genes and is born from this competition. Environments where they are forced to work together fast become toxic.

They also can't be physically aggressive, so their aggression takes the form of ruining reputations, gossip, exclusion, etc.

Not to contradict you, just adding one more thought to your analysis, which I found very insightful.