And casual ageism, insinuating that children behave this way. Yet most kids I know are far more reasonable, willing to play together, willing to concede mistakes, etc..etc...

Yes, traditionally women would engage in passive aggressive slights and backhanded compliments more than men would, who would more likely engage in a physical fight. That is a pattern based on historical reality and observed and acknowledged the world over. Your attempt to make it a pathology to recognize and affirm the observation is itself a pathology, a rabid ideological one.

And I would not say it's a 'historical' thing. It's the reality we live in.

Men and women have different survival strategies. YMMV. Not everyone is the same, etc.

> Casual sexism, insinuating that men don't behave this way, but women.

Not wrong, but if you wish to communicate with someone you sometimes have to transmit in a language the receiver will understand.