Quote from here:

TLDR: women try to false assign signs of masculinity in a negative way to sabotage other women's mate choices (an decrease their reproductive success). An interesting view and may describe some of feminists' propensity to pathologize men's behaviour as toxic.

Toxic Masculinity as Mate-Choice Disruption: Branding dominant, socially aggressive male behaviors as toxic targets the precise traits women's evolved preferences favor in high-quality mates. Unlike costly signals such as physical strength or social dominance — which require genuine capacity to display — signals of harmlessness require nothing, eliminating reliable mate-quality differentiation. Women then make explicit mate choices misaligned with their implicit preferences, producing unstable relationships and reduced long-term reproductive success.