Let's say they are obsessed with beating or one-upping you. If you react in a way that's indifferent, like you are not in competition with them. Even if they got all the awards, grades, you will have beat them. Think about it, is it fun to play a game with someone who has no interest in playing back? The game isn't fun anymore and you'll look for a new willing participant who will play. If you get upset or defensive, but have the award they are asking about, they will have won. if you just can't fake indifference, can you just avoid them?