Me and my brother just don’t get along

Hi, I (14m) and my brother(11) have never gotten along. We are polar opposites, he’s becoming transphobic and ableist and has even started watching Andrew date, he’s also a brainrot child and I literally can’t have a conversation with him without him playing Roblox at full volume and singing brainrot songs or screaming 67, and this gets on my neveres because I have sensory issues (diagnosed adhd on list to get tested for austism) and can’t handle all the noise, I’m the weird kid in my grade and he’s knows this and has told me not to tell people I’m his sister (I’m his brother) because he dosent want to be associated with me. Will he change? What do I do?