burnt out gifted kid

A kid who was "smart" in their younger years. Often growing up a perfectionist and or having a superiority complex. Who when reaching middle, high school, or collage, cant keep up. Becoming paralyzed with who they could be, struggling to keep up with their past grades and achievements. The kind of person who grows up to have Imposter Syndrome.

Joe was had such good grades back in middle school, now he's just a burnt out gifted kid.