The definition of a disorder is that it's interfering with your life. So, if it's not bothering you, ALL GOOD. :) You don't have a disorder.
I appreciate that you're well-intentioned. And of course if someone is happy exactly as they are, that's awesomesauce!
But to the degree someone expresses that they struggle with something, and they might benefit from learning more or exploring options, it's not wrong to gently and respectfully encourage them to explore learning/options.
It doesn't mean someone is "calling them" something.
Yes, you WERE too smart to be forced to sit around and learn at a pace that was way too slow for you.
Imagine how much you could have learned if you were progressing at your own pace (let's say top 10%) rather than school curriculum pace (let's say tuned for 90% of students to keep up)
Think about how much more successful you could have been in programming if you had learned calculus by 8th grade, a task I'd say at least half our U.S population is capable of.
Instead, you are forced to put up with the same spoonfeeding as everyone else, and if you don't like it, you have a disorder?
You were rightfully frustrated and upset at this waste of your time. Not to mention how unnatural and unhealthy it is to sit in place for hours at a time.
It's not a disorder, it's a natural response to reality.
You are fine and valid the way you are, and don't let anyone call you a disorder.