Having a sibling with mental illness is hard

My brother has been mentally ill all of his life… he has adhd, ocd, depression, anxiety and a bunch of other things. I know it has to be hard for him to put up with everything, but I don’t think my family realizes how bad it is to be on the receiving end of some of his preferences. Because of his OCD he can only sit in a specific chair and can’t have certain materials touching him and he always has his pick of beds on vacation or rooms in houses whenever we move. I accidentally picked up his phone once because I thought it was mine and he got super mad at me and yelled at me because he can’t handle the germs I put on it. We went on vacation and needed to sleep on the bottom bunk because he couldn’t bear to sleep in the top one even though I have multiple knee injuries that makes it difficult for me to get into the top bunk. He moves my things without asking because they don’t look right to him and he gets mad at me when my arm or leg touches him when we’re sitting next to each other. I genuinely don’t know if I can stand it for much longer because my parents and him are so focused on his mental health that they didn’t notice when I started cutting myself last year. They found blood on a razor and immediately thought it was his, but when I said it was my razor they thought it meant that I had nicked myself while shaving. It’s like my whole life is walking on eggshells around him. I’ll make a joke about his sleeping schedule or something and he’ll immediately get mad at me and say that im not taking his mental health seriously. Im just not sure how much more of this I can take. I know I know I know that it’s hard for him but I feel like it needs to be acknowledged that this is difficult for me too.