This comment is irrelevant to your story. It is also not explained in any way. There could be many reasons why "The entire school despised an distrusted the Principal" and, in reality, it is probably not true.

As for, "She was an evil woman." - That is character assassination and inappropriate. It is also untrue. No-one is 'evil'. In everyone there are character traits and capacity for behaviour both positive and negative. 'Evil' is a religious concept that has no objective meaning but has entered common parlance in such a way as to be used in an indiscriminate, ill-considered and thoughtless way, just as is 'love' and other such over-used and ill considered common concepts.