I agree. It is possible that all his relationships are along “idealization-devaluation” axis, however, but we see this trait only in his attitude to Suzanne because ultimately, we are looking at their marriage. This being said, I assume that he might have treated a stronger woman much better. Suzanne sacrificed too much of her independence for the family. Barry was making the decisions, Barry was giving her the weekly allowances, Barry was controlling the family, and in Barry’s eyes, he was the only one working. I believe Suzanne’s real chance at freedom might have been divorcing BM when she got the inheritance.
I can’t understand Barry, but I think that his stubbornness and avarice are both inborn. As to women, he might have modeled his behavior after own father, with some variations.
I don’t like to use the word “narcissistic” because it has become the “mot du jour”, but BM's interviews in the affidavit reek of narcissistic injury. He is unloved, disrespected, unappreciated, unrewarded, it is never the husband’s day. (And he is vindictive).
At the same time, BM is probably very good at things that interest him, but leaves plenty of loose ends elsewhere. Hence, Suzanne’s body will probably not be found because getting rid of it involved the mixture of hunting and some professional skills, and he was good at it, but the tiniest part he was not interested in - the mountain bike - was the beginning of his downfall.
JMO - Barry's weakness is not understanding people. That “Oh, Suzanne” video shouldn’t have been made. All that was said about sex life and got into the affidavit should not have been said. Referring to one’s dead (or even, presumably disappeared) wife as the “lover” makes me strongly doubt his faith.
And if he did not know about JL, he was paranoid enough to constantly suspect someone in Suzanne’s life.