In most cases, your boss wasn’t evil. You just didn’t get along. Good thing you don’t have to anymore. Even if your boss did do something super illegal, you don’t always get justice. Even if you did get justice, it doesn’t undo the awful thing that happened to you. It’s better to get out of the situation. Keep the awful thing from happening in the first place. 

Your organization isn’t a spreadsheet. You can’t just delete the cells with numbers you don’t like.