Talk:Equestria Girls animated media/@comment-25003213-20170611134400/@comment-10390252-20170611174520

My guess is that the Shadowbolts undermined her and blamed her (not unjustly) for everything that happened during the third event of the Friendship Games (and, by extension, Crystal Prep not winning for the first time in the competition's history). Combined with the likelihood that she may have started being a bit paranoid about 'magic', she could easily have lost her ability to manage the school faculty and keep discipline amongst the pupils because she'd lost credibility with them.

In the end, it was a choice of jumping or being pushed by the Board of Trustees.