That's horrible! I'm so sorry you had to experience this!!
I never could understand it, but I also seemed to be a bully magnet. As previously mentioned I was bullied by the teachers. I was always their target. However, other kids in my class got bullied by other kids. I'm not sure why, but I remember trying to pay close attention to the kids getting bullied and tried to figure out what they did to prompt the bullying. However, most of the kids that were bullied had a physical issue that got them bullied. I do not remember any teacher ever protecting any kid from being bullied. Sometimes they would join in the bullying action.
It wasn't until I was older that I realized that my expressions and mannerisms made me very different. I still don't know how to look "normal", but it isn't as much an issue now.
Also, would never attempt to defend myself. Regardless of ability, I simply can't make myself try to hurt another person. However, I am quite small and have never engaged in any form of physical competition with anyone. If someone attempted to beat me up, they would get no resistance. I can't even play any sort of competitive game; board game, cards, etc.
There were many occasions that I suspect I escaped bullies, because I could run very fast. Also, which was not a strategy, but if chased, I would laugh loudly, thinking the chase was very fun. In any event, I was never caught and I don't know if the laughing diffused anything. I just really loved a good run.