No, he isn't John Q Studly, that's for sure. But, he complained about Shanna's looks. IMO, she was pretty. I guess he wanted to be with someone he felt was stunningly beautiful, to bolster his self image. Makes me wonder why he married Shanna in the first place. For her money? Was he hoping for someone who would also support him financially so he could quit his job and play the field? Just speculating that maybe that was his plan, but then Shanna had a baby and didn't return to work. He got a promotion, but maybe he was bitter about being the breadwinner.
I'm reminded here (as with so many cases) of a friend who took advantage of me financially and materially, as I suspect she did of many other people, especially after she and her husband separated. She claimed he abused her, but she spoke disparagingly of his appearance, his intellect and his ability to provide financially. Yet, she had not worked in over a decade and he had a steady job. She made comments about herself implying a superior intellect (not), a beautiful appearance (not), and that she was chief breadwinner. She pretended to care about others only to get close to a person so she could manipulate them into getting whatever she wanted.
IMO, these people are narcissistic sociopaths who view other people only as tools to obtain what they want in life. They are unable to empathize with others and are concerned only with their image and their desires. I can't imagine what Shanna experienced in her marriage, but I know she deserved much better. So did Diederik.