My name is Little Snow andI’m being bullied online because of my disability with ponies saying that I’m not actually disabled and that I’m just faking it, I keep telling them I am not, but they don’t listen to me, one day it gets so bad that.
Twilight didn't get her letter to Princess Celestia on time and has been kicked out of school. Obviously she is angry and while she is angry that her friends never took her seriously, it is the one who kicked her out she wishes to exact revenge on.