There are many different types of feminism, and one of them is radical feminism. Radical feminism argues that men are the enemies of women, and all of our problems are due to men. It's basically the most extreme version of feminism, even going so far to say that "All sex is rape"!! And since that's the case, it says, marriage is bad and no one should get married. It's often radical feminists who are also against shaving, wearing shorts in front of men, and so on - since they acknowledge that it's mostly done to please men (which men like women with hairy legs, for instance?).

At the other end of the extreme, you have cultural feminism, which argues that patriarchy is the best thing for humanity, all women MUST get married in order to be considered full women, and any woman who chooses not to have a child is just selfish and everything bad.