I will share how a tough boy much younger and smaller than me tried to beat me and mess with me. Whats your opinion about it?

Back in starting of 2016, during my last days of 10th grade, I was very popular in school among my juniors because of my childish nature. I remember after school hours, some group of 7th and 8th grade boys used to mess with me and try to scare me showing their fist. I used to usually take it lightly as they were younger than me but sometimes even I used to show my fist to them trying to scare them off and they used to laugh. But seeing that another boy started trying to scare me off. And you won't believe that tough boy was actually in 3rd grade. Yes he used to often come running towards me trying punch me. Seeing that even the 7th to 9th grade boys used to laugh at me saying "you are waste dude even a 3rd grade boy is trying to hit you." That boy used to always after school hours trying to punch me. Usually I used to just walk backwards when he used to try to beat completely confused what to do because unlike those 7th or 8th graders whom I could try to intimidate, I couldn't do anything because he was very small and teachers or any adult would scold me if I tried to fight him back. As I used to walk backwards that kid used to laugh and call me a scaredy cat which is another meaning of a cowardly person. Once or twice he have even punched me and ran away too. It wasn't painful but other boys around my age used to laugh at me. I bet that 3rd grade boy used to brag to his friends that he used to beat and try to scare a big 10th grade boy.