It's all my fault.
Why do you think it's all your fault?
I feel like an idiot. I've done so many things I regret.
It is good to acknowledge you faults and failures. You can learn from yourself by being so honest with your self.
Why do I even try? It's all my fault in the end, and I'll never get it right.
I understand how you're feeling, but I don't think you should say that you'll never get it right. I think you should keep going, and one day you'll succeed.