I’m pretty sure my ex husband would call me a walk away wife. Thing is though, I talked to him hundred of times about how the marriage wasn’t working for me. However all of my concerns were dismissed, ignored, not taken seriously. Simply put he did not listen to me.
I even told him for years, that this wasn’t working and I was going to leave him unless things changed. He just got mad at me when I did that. After I left he seemed totally shocked, and in denial. I don’t know what more I could have done.

Here’s more of my story about my divorce here.

https://sarahdoesmath.medium.com/he-says-i-blind-sided-him-c7100312de91

I have seen this in both genders. However, I think there are cultural factors that often make women more prone to it. I’ve read many stories where men are not listening to women. I remember using “I messages” to convey I was unhappy in the marriage, and he told me that men aren’t concerned with feelings, they were more into other things. He pretty much dismissed my problems with the marriage to silly girl emotions that he had no time for as he was a man.
When I told him I was considering leaving him, he told me to stop being manipulative and controlling, and pretty much accused me of being dysfunctional in our marriage.
One thing I see a lot of, is when women try to have an honest talk with their partners about problems they’re having, they’re often labeled as nagging. Nagging is seen as a feminine quality, almost never so we hear about men nagging. When I told my ex about the serious issues we had, he also told me to stop nagging. So I did. I stopped nagging, I left. I will never nag him again.
I don’t really get how he is in denial of why I left, but if you ask him, he’ll probably tell you I have no warning and was there in day, and gone the next.