Agree with the other posts sounds like you have answered your own question anyway and dont like having her so just re-home her but try and make sure Lfs is the last resort.
I personally think you should get rid of it because it is causing problems. Also, it seems like you are holding on to him because of his aggression, so if I where you I would look for a semi aggressive fish, one that is mean, but not to mean to the point that you dislike it.