What to do about annoying siblings?

I'm 15 and i have 3 annoying brothers they are 8,11 and 13, they really piss me off because they always getting me in trouble with my parents and they blackmail me and I am always told to be the responsible one when they start it, I just want to kill them, what should I do and is ignoring the best way to deal with it and do u have any advice?? Thanxs