Considering how difficult Yale is to get into, I think your brother might face a tougher time down the road if your father is already convinced that he will get in. Some parents will never be satisfied, furthermore. If you had gotten into Yale, your father might belittle your choice of major, or your social circle, or the Greek-letter society you do or don’t join. Live and love your own life, and hope that he will ultimately want to be part of it on terms that you can agree to as an adult.