This is standard operating procedure for female characters on Glee. I think there is an assumption by the producers that female characters cannot be interesting if they are not mean and/or selfish.
Maybe it was because of the social and political turbulence, or maybe it was because of the drugs. Maybe it was because television was still relatively young and foolish. Millions of Americans tuned in faithfully each week to watch the supernatural and the absurd.
As we prepare to send my son off to school, it hit me suddenly that he just hasn't seen enough culturally significant movies to chat about with his future college classmates. So as a public service for other parents who, like me, have been negligent, here's a brief filmography.