Why do they always target your bedroom?

I was being abused in the kitchen, so I stopped using the kitchen. I bought food which did not need cooking, and kept it in my bedroom. I ate out of tins in my bedroom. Then, they started targeting me in my bedroom. The closer I get to leaving, the abuse has gotten worse. I stopped speaking to my siblings. And then, my nmom would take them into my bedroom and show them the LEAVE ME ALONEs I had on pieces of paper taped to every wall. I walked into the house one day and one of my siblings started bullying me again. "Sure you're not schizophrenic? Autistic?" "Either you can leave or I will, which is it?" I said back, but she didn't listen. "Suffering paranoid delusions?" "You are not respecting my boundaries." My sibling then said, "what, do you want me to leave you alone?" She half laughed at me. I knew she'd been into my bedroom. My nmom went in there and was yelling at me over the trash in the bedroom - because I did not have access to a kitchen. Sometimes I think, 'these people are going to end up killing me.'