I don't agree a woman should keep a miserable man. Because if he is still healing from an old wound and bringing in his frustration on the new woman then he is miserable.
Excepting women to mold an adult is part of the reason women are opting to stay single. We are tired. Men think they don't have the strength women have in tolerating bullshit. That's because they don't value the women they are with. Because men who value their women but as much effort, even more than women do in the relationship.
What I see wrong in this post is you excusing men's immaturity. You are practically saying men are weak, so women should understand that's why they act selfish and useless at times.
What about erasing this egoistic misogynist perception and starting to take responsibility for your action? What about staying away from women and working on your healing first, if you feel frustrated from an old would? Courage is learned. Strength is learned. What about men sucking up and learning about emotional discipline?
The truth is intelligent women don't give a fuck anymore. We don't sit around waiting for a loser to man up. Men want already groomed women, right? Well, women are going for already groomed men too.