Is it normal for boys to get bullied in school?

My little brother got bullied n faced harassment & got assaulted in school. thought i was close to my brother. I didnt know that he wasn't comfortable in talking about this to me. I failed as a sister. He took admission in this new school in Mahim. Everytime he used to tell me about something related to school and how the kids in this new school are weird (chapri) & use curse words i used to ignore him. This morning dad handed me a letter wrote by brother to his principal. At first i thought it was about the mockery he made out of his grammar & till the end i couldnt believe what i read n cried. I can't believe this is happening to my lil brother in school. I cant even imagine how bad & depressing days he might be facing as after going through hell in school he comes back home to get yelled by me. I hate myself even more now. This is so fucking messed up. As i girl I've only faced name calling in school and none other than that. I never knew such things would happen in just 8th std while he is what? 14yrs old. He was so excited to participate in fancy dress competition, he wanted to cosplay as General Hux from Star wars, for which dad even brought him a new suit. I hated that outfit as i knew nobodys gonna know the character n even told him a couple of times to change it. He was so happy about the outfit & character from days and he got bullied for that from a 15yrs old, from 9th std, an older kid. My brother has a pure heart, bro cant even cuss properly n mutters to himself when he argues with me. he never deserved this. No kid at this young age deserves this. I will certainly confront the school about this.