You only actually hurt yourself. It feels really unfair, you got screwed & you can't let go. You cling onto the hope that one day you'll get justice. But inside you know it won't happen. It's gone, it's in the past. You're the only one that cares. When you tell other people, they can't understand the intensity of your feeling. They even start to get a little bored. You get exactly the opposite effect of what you wanted. And yet you can't let go. That would be like endorsing the injustice. Or would it? The injustice is in the past, it's over. Concentrating on it takes your attention off the present, certainly off the future. But it's an addiction. Although you know it's hurting you, you can't stop. And it saps your energy. So that the overall effect on your life is like driving a car with the brakes on.