The problem was that he supported her after she quit her job. That means that she's been dependent on him according to the courts and that he's paying for her house. Most people don't have the means to do that.
The government takes a dim view of people supporting a partner for 10 years then cutting them loose; the government has no desire to support the partner either once they've been abandoned and made destitute,
It's difficult as a man but by no means impossible. Women who will have successful careers simply aren't doing the live abroad, travel and party away their twenties thing. That's like guys who spend their twenties trying to become a rock star or a rapper. There may be a lot of them, but they're to be avoided by anyone seeking a serious partner. The problem is that they're the ones who are doing a ton of dating, running around the online-dating carousel and generally slutting it up so it seems like there's a ton of them but that's an illusion. Far more of them don't want to have a casual relationship, don't want to slut it up and seek a secure life. That's what you have to look for.
The great thing about coming after the boomers is that no one wants to live like them. No one wants to go through a divorce, or to have an insecure life. There's some who are so scared that they turn away from it altogether, like the women you described but most people just don't want to live like that. The key is finding them.