That sucks. Bullies always prey on the smallest and the weakest ones, since they're physically incapable of defending themselves against a physically superior attackers. Typical. If they pick on someone their own size, they risk the possibility of getting a taste of their own medicine.
In my country, bullies are even protected by law and therefore completely immune to any kind of prosecution. They can literally kill any of their peers and get away with it, while their victims are treated with "it's your own fault you got attacked, so fu*k off" attitude. Unbelievable.
What's the situation like on your end of the world?