There is nothing good to say about sexism, but these characters have proved the heart is fickle because we enjoy their presence more than we logically should.
The art of acting doesn't necessarily end in front of the camera; sometimes it's behind. Some of your favorite actors also have directed your favorite shows. Has yours?
A lot of times our favorite characters happen to be the most unstable ones. We love them and we hate them, but, most of all, we watch them because they add the crazy.