Yup, that's part of the problem, that darn sense of justice.
She also doesn't understand that people are, by and large, selfish assholes who only care about themselves most of the time, and any perceived negative behavior or actions towards her is very likely subconscious and they'd be mortified if confronted with it. She won't confront them, and she won't let me do it.
Do you also tend to learn a new job very quickly and actually put effort into doing well? I'm convinced that's why she's had trouble at every job she's had.
At every job, her manager also had the same job duties, so my suspicion is that they secretly resent having to work harder to not look bad.