I think beatrice, that some of them are so unable to face that the demons they face are their own, they need to blame someone or something else and of course that is the person they were closest to. My W has said when she was lucid, that she has tried so many things to be "happy". She was a mother, she was a wife, she lost weight, she threw herself into her work and nothing changed. Now she thinks that the biggest change she can see is no longer being married. She said she was never "depressed" before she got married so maybe once she is own her own, totally in control of every part of her life (who is?), she will be happy.
Of course she was never depressed before she had kids, lived in TX, had 3 dogs, etc. No, easier to blame her "bad marriage" as that can be fixed without the pain of looking inside herself for the answers. They also seem to not like that we aren't in pain like they are. They are angry because they want to blame you and make you feel as bad as they do! That's just a thought. I could be wrong. But like T2 said if the "empathy chip" is not working, they can't care about anyone else!