is this okay

I have been writing a short story. Its almost finished but Now I am having second thoughts and not sure if it is good. I wont reveal too much spoilers. But I made this Character. He or She has done something, killed someone. Lets herself get arrested to make a point. Something Political and she wants a big trial to do it.
As the Trail goes, we find horrible things happened to her and we see why she did what she did.
Then later, we realize she did some very horrible things too, to those who hurt her and their family's, shes a monster too.
I am asking, is this playing with the readers feelings too much and will piss the reader off making her into a sympathetic abused character then revealing in the end, she isn't really any better than those who hurt her.