If you have been bullied out of, or illegally fired from, a workplace, I don't imagine you'd actually want your old job back. What you would want is enough money to cover your living expenses for long enough to get a job you do want.

If you slander your previous employer, then you deserve it if your career comes to an end.

A successful lawsuit against a previous employer wouldn't be likely to make you untouchable. However, I could see how an unsuccessful one would.