I have a older sister who thinks shes queen. We dont get along and I spend alot of time trying to knock down her attitude a few notches when shes gets her attitude going. Like today she was bitchin about some of my stuff and I said why do you think your better then everyone? Your not your worse then everyone.
Im not saying you should do this to your brother. My sister makes a point to let everyone knows shes top dog.
What really bothers me is my cousin. Hes a little older then me, looks like me and he pretty much said fuck all you to everyone in my extended family yet every thinks hes the greatest thing ever and Im a sum ball.