I can't sleep because my brother is playing games with VC at midnight and my mother refuses to help.

So me an my brother who is 4 years younger than me share the same room. It's summer so schools are closed snd he stays up late every day up to 3-4 am, playing games with voice chats (mainly fivem) and he always talks too loud so I can't sleep because of that. I told my mother about this and she barely does anything to stop this. She just comes and says "Turn off the PC, your brother is trying to sleep" then he replies "OK" and she leaves, but he keeps playing. This happened a lot so one day I talked about this with my mother and she scolded him a lot this time but nothing really changed since my brother just jokes about it, makes my mother laugh and the situation ends just like that, but I still can't sleep. I can't just beat his ass cuz he is 2 meters tall and goes to gym. I tried to come up with various solutions like disabling the internet through the modem interface but he found out that it was me. About a week ago, I installed a trojan to his computer so I could control his pc. I kept sending him fake virus messages so he may consider formatting his pc which would prevent him from using the computer for 1-2 days. I told about this to my mother saying his computer is fine and it's me who's doing it so she wouldn't call a technician or something. She felt bad for him and told him the truth which ruined this plan too. Now I don't know what to do. I ran out of ideas of secretly sabotaging his pc, my mother is not caring and saying I should deal with it myself, I can't just brute force him to turn off. My sleep schedule has been fucked up because of this and I'm really sick of this. My other relatives are saying that I should change my room but why am I the one going to another room if he is the one causing the problem? Nobody is giving a crap about this situation but at the end of the day, I'm the sleep deprived victim. What should I do?