You're gifted enough to cruise through the first few stages of your education without trying, so you forge an identity as "the smart kid" but never build up skills in learning or studying, so when you finally get to a level where your natural intelligence can't carry you anymore you can't keep up with the people who did learn those skills and you start to fail and lose your identity as the smart kid which causes you to break down because that'd how you defined yourself for so long..... or so I've heard.