International Brotherhood of Men

I have a question. If foids only keep having sex with chad after their unfortunate sexual liberation, you’d think humans would have a sort of Fisherian runaway where men would keep exponentially getting taller, scoring higher on the decile scale, stronger, etc because of sexual selection. Yet we see that inceldom is only rising and the trends seem to be that men are actually going the inverse direction (feminized, androgynous, etc) and birth rates are also plummeting, why is that?