Devor, you are assuming 1) that the readers are idiots; and 2) that the relationship is meant to be emulated. It's a bizarre criticism of literature, in my view. If you were to go through the body of human literature and discount and/or express for contempt for any that featured dysfunctional relationships, you'd have a huge stack of books piled up in your yard, many of them quite good. It's a self-serving and selective criticism that holds no weight unless you are going to take an absolute view of such things in literature.