The thing about mistakes is that, when you make that mistake, all the blame is on you. You are expected to take up all the responsibility.
People just don't see what actually happened to you, why you made that mistake. And very often you'll want to do something to make thing better, make it the way it should be. But people just doesn't trust you anymore. They just don't want you to do anything.
But you know, you honestly know that you are able to do it well this time and no one is giving you a chance to do that. All they do is blame everything on you and keep insisting everything happened this way just because of you.
We all hate that feeling, don't we?