Unfairness

I really don't see why the mother keeps yelling at me for trying to be respected.
Today at lunch, the sister accidentally threw some plastic object on my plate and said "oops". I asked if she wasn't even going to apologize and she claimed "I said oops" as if that was the most humble of apologies and I was accusing her of murder. And guess who got yelled at? Me, for being troublesome.
Also, just now, I'm sitting at the dining table doing homework, and the little sister is watching TV. I ask her to turn it down and guess who gets yelled at? Me, because I could be studying in my room.

The worst part is, I feel really guilty for the space I'm taking up here. I know I'll be out in a few months but that's not enough comfort for me right now.