Maxperson
Morkus from Orkus
Bang! A fallacy of the first water. You are asserting a belief that if a thing is above average in one aspect, it cannot be below average in some other aspect.
Exercise for the reader: which class of fallacy has been exposed?
None. There is only one aspect being compared there. Intelligence. Genius is a measure of intelligence and by definition well above average. INT is also intelligence. You cannot be simultaneously well above average in intelligence and well below average in intelligence.