Betty Draper

In some sense, the entirety of "Mad Men" is about unpacking Don and Betty's relationship — the perfect 1950s relationship that looks immaculate from far away but reveals its fissures as you zoom in. Betty buys into the illusion Don Draper tries to live, but as she slowly realizes that the man who reinforces her self-image is a sham, she herself begins to implode. She and Don eventually force each other to confront the other's illusions, and destroy their life together. The whole thing rates pretty high in terms of dysfunction.