I was like that as a little kid, and honestly, nobody could discipline me very well cause I didn't understand what I was doing wrong.

Why was I punished for getting mad at someone that was mean to me? (I didn't understand I got way to angry)

Why was I punished because I knew the answer to a question? (I was impulsive and interrupted the teacher and didn't raise my hand)

You can look up books on this, like know there are parenting books for rage-filled children and ADHD children, though I bet there are forum members here with better tips than me.