I don't know any psychology but my marriage only lasted five years when the light finally came on.I thought I detected an opportunity for levity. Glad I was not confused and incorrect on that account. I've had a few friends go through this. Most seem to have taken it in stride and count their blessings when it's over. Others ... not so much.
Our idiosyncrasies collided: She could not stand being treated well and I could not stand being treated badly.