For civilization to flourish, men must be motivated to work as hard as possible. This is done by rewarding hard working, productive men with status, wealth and a family.
(NOTE: men should not automatically be granted status. They should get status from doing what civilization needs them to do, i.e. provide for and protect women and children.)
Women do not need to work hard for civilization to flourish. Women need to make babies. Women are hypergamous, i.e. want to mate with men who are higher status than themselves. When women raise their status they find fewer men acceptable as mates, so the birth rate plummets.
Feminism has resulted in women taking jobs that could be done by men. By raising women's status and by removing some men's ability to provide, it has destroyed the birth rate; disincentivised hard work, risk taking and industriousness from men; and created a dysfunctional dating culture and society.
But as I say, the feminist chickens are coming home to roost. Feminism disincentivising men means women are going to have to take on more and more of the responsibilities and burdens of society, while more and more men drop out to play computer games and watch porn.
The low birth rate means we need to either remove feminism or import immigrants to keep the economy chugging along. Immigrants tend to come from more patriarchal societies and don't care about women's rights. Things cannot keep going in this insane direction.
Have you ever wondered why every successful civilization across the world has been patriarchal? Because Patriarchy is required for a successful civilization. Weaken Patriarchy and you disincentivise men, weakening the civilization until it gets taken over by a more patriarchal society.