I do think for women, a lot of propaganda has been made to push that getting married and having kids is the end of your life, talking about how ot severely impacts your career and how your body is ruined after. I
I feel it's that way for both sexes, just for different reasons. A popular idea in culture is also "The man doesn't want to be married and the woman does, the bachelor party is one last night of freedom before he's ball and chained!". While women are pushed fear of their bodies and career, men are pushed that you're losing your freedom, you'll get divorced and she'll take everything, etc.
In general even with the negative messaging for both sexes, I think many people are just bad at picking partners, bad at compromise, bad at not being themselves early on so each party truly knows who they're getting, and in the age of social media it's easy to be inundated with so much shit to compare yourself and your relationship to that it adds even more acid to dissolve that relationship. You have to remember, kiwi reading this, that you may know intuitively social media is doctored and showing but a glimpse even if it isn't outright fake, but people other than yourself are really fucking stupid.
The amount of guys I know who hate their wives or ex wife because she hated his hobbies, there's many. Why'd he get married to someone if that's so important to him? How much did he do them, too much? Maybe she felt left out or alone, did he compromise? Maybe he didn't want to do them much but when he did she raised a stink, why couldn't she compromise? Maybe he simply is just a man child and never puts their relationship first, many such cases.
There's so many questions and it's a flow chart mess, but the bottom line is you didn't truly know the person, compromise failures, or people just change. You or the person you marry isn't the same person you're going to be with the rest of your life. And it swings back again to compromise.