I Dislike Mean People

For 6 weeks I had a trainer who had a bad attitude toward us trainees. Every now and then she would say things that were hurtful to us not taking the time to think it through. One trainee made it be known to our trainer that her attitude needed fixing, which resulted in her apologizing to all of us and promising to go easy but eventually she went back to her own ways. Last week she decided to have her moment with me and for the rest of the day I was pissed. Near the end, she had the audacity to ask everyone will we miss her. I told her "NO". She was so shocked by my answer, I guess because I'm viewed as nice and all by her.