Bad traits or just bad attitude??

One of my sims married a random townie who turned out to be Mean. She was the first sim I’d encountered with that trait and she wasn’t much fun. I had to micromanage her all the time as if I left her to her own devices she always did something unkind. When they had children I constantly found her on her way to smash the doll house. When she finally died of old age I thought I’d be able to relax but the first time she came back as a ghost, the first thing she did was smash the doll house! I can cope with Evil and Perfectionist but not Mean, no way.