I immediately knew that you must have experienced something to cause you to behave this way.
I was bullied pretty hard from grades 2-6. I lived in a beautiful, large, 16 room house on 6 acres in upstate NY, but because we were right on the line between two school districts (one good, one bad) I was required to attend the bad district with a lot of poor kids, migrant worker children, etc. There was extreme poverty. Some of the kids who rode my school bus lived in ramshackled houses with no electricity or indoor plumbing, and others lived in motels with drugs addicted parents. Needless to say, I was picked on and beat up every single day by these kids. My hair was clean and neatly styled so they'd spit or stick gum in it. They'd cut my new clothes, coats, etc., with scissors. Once I was invited to a birthday party by the kids up the street and my parents reluctantly let me go. I was invited only to be tortured and beat up by the entire group of kids for 2 straight hours.
At first I didn't understand and was just so humiliated and didn't know why they all seemed to hate me. As I got older I realized that they were acting out due to their own horrible circumstances, and they were jealous of my home and family. Little did they know that appearances are deceiving and my home was nowhere near as great as they thought it to be.
Anyway, my point is that bullies are usually experiencing rage and taking out their anger on someone else. There is always a method to the madness.