When you ask the average Red Piller "which gender is more narcissistic?" 95% of them would say that women are more narcissistic than men.

Yet actual studies show that men consistently score higher on narcissism and have a higher self-esteem than women.

If you asked a Red Piller which gender is more machiavellian , they would say women. Yet studies once again refute that.

This is one example of how TRP promotes a worldview that makes men nicer than they really are, while simultaneously making women appear worse.

When the Chris Watts case broke out, prominent Red Pillers , like Rollo Tomassi started spreading conspiracy theories that he probably killed his wife and kids because his wife had an affair. When it was revealed that it was actually Chris that had an affair they had nothing to say. TRP constantly paints men as helpless victims and women as manipulative harpies from hell. They say they are realistic but they always have this romanticized idea of masculinity and men in general.

TL;DR TRP is biased because they romanticize men and demonize women.