Nobody is asking for, or expecting, moral lessons. That's what Full House or Growing Pains were for. The point is that, especially upon a second viewing, Don do

Nobody is asking for, or expecting, moral lessons. That's what Full House or Growing Pains were for. The point is that, especially upon a second viewing, Don does so few positive, admirable, or generous things and so many selfish, nasty, hurtful things. It still doesn't make him a "bad person" like Joan's rapey husband, it just demonstrates that Don is innately an asshole, a very big one.