I was bullied as a young girl.
All this business about bullies being insecure is nonsense, in my opinion. In my case, it was the pretty, wealthy, popular, jappy girls that were the bullies. They did it because they could. Also, notice that it's never an awkward, pimply faced, greasy haired kid that does the bullying.
No doubt, but it usually results in the awkward pimply faced greasy haired kid going on a shooting spree in their school after they are bullied.