Aurgh!!!!!

Something is seriously wrong with my brain. i think that somewhere along the way something happened to it, and now it is malfunctioning. either that, or it was never right to begin with. How else can one explain the number of hours I practice ear training, and still suck. You have no idea how much I practice, how many times i listen to the song, how many times i play it over and over and over and over and still not know. why why why why...... I am so frustrated and mad and angry and sad. how can someone who has taken 10 years of piano - 10 years of fricken ear training and not know what the hell they are doing?!?!? Im just really upset right now. I can't wait to go home tomorrow.