4. Margaret White Carrie (1976)
Let's get the obvious out of the way: she was a nut that used religion to torture her daughter. When we look a little deeper, we find she was unhinged before Carrie was even in the picture. She had premarital sex with her future husband, then tried to kill herself. After they got married, he raped her and she became pregnant with Carrie. I think all the crazy decided to come out after Carrie was born. It doesn't help her husband left her for another woman. The cherry on the psycho sundae is Margaret confesses to Carrie she actually liked it when her husband raped her. Without getting too personal, I'm just going to say someone has to be mentally ill in order to enjoy an act like that, and Margaret proves that point very well. Also, I'm not knocking religion in any way, but shoving your daughter in a prayer closet when you think she's doing something devilish, or when she gets her first period? Pretty sure that's not in the bible anywhere.