In traditional monogamy, a woman is taken care of through old age and she naturally enforces fidelity on other women, because it benefits everyone. Monogamy naturally makes women keep other women in line on who they sleep with and what they do. They do this through shame and gossip.
In polygamy, older women actually have a lot of power, including sexual power. They manage shit. And they can demand things from the husband. It is patriarchy, but women, especially as they age, actually gain a considerable amount of power, more power than the man in many domestic aspects. As a consequence, older women have dominion over younger women in many respects.
In Westernized Feminism, these roles are destroyed, so older feminists lash out not only at the system, but also other women, especially younger women. They try to dictate who women should sleep with through shame. And they straight up try to boss other women around like if they were in a polygamy situation. But it doesn't work out: because Feminism says that women get to do what they want. And women tend to want the same sexual relationships you find in polygamy with freedom to do things they couldn't in polygamy. This cycle is destroying our culture because we are literally pitting the worst aspects of polygamy and monogamy against the system itself: older women are completely replaced by younger brides, and then lash out and try to enforce power they don't have, so they turn to legal means to just fuck everything up because they can't, and will never, get what they want.
The funny thing is, and it is funny, in both monogamy and polygamy older women don't get replaced, and their sexual value lasts a lot longer. You continue to fuck your management because they get things done. You likewise are under an agreement with God to stay faithful to your one wife. Under our Feminist society, you ditch the older woman for a younger one.
tl;dr: Feminism is a cancer that hurts women, especially older women.