

Well she had two Sith Apprentices who betrayed her, as is their way, Sith who were on the verge of destroying all life in the galaxy, the best true jedi seen since the days of Exar Kun and an icon. Their time together is virtually unknown, and what little we do know comes from Kreia, who is a master manipulator and liar. Who better to blame for Revan's fall than his first and last Master? kreia got to be the scapegoat this time, but again it is not known if this is because of the importance placed on her training with him or she was handy to lay the blame at her feet. When the fecal matter hits the fan in a major way, heads will always roll, and there will always be a scapegoat.

However you word it or describe the circumstances, 3 out of her 4 known students tried to kill her. Yes, Revan had left her long ago and yes, Meetra was forced to fight her. While it is typical Sith fashion to turn upon your Master, they turned on her and cast her out because they had tired of her teachings.
