i hate to say this, but i don't really understand any of the math. somehow i aced anyway by solving whatever problems was on the exams.
i also aced calculus 1 & 2 via straight memorization and also had no interest in math whatsoever. i definitely was not inspired, motivated or got excited by math (at all!). it was getting the "A" that excited me.
if math is really not your thing (like me), find something else that excites you to get through that class.