I didn't mind calculus. The symbols and terminology were confusing but the basic idea wasn't so bad.
Don't get me started on trigonometry, though. I really hated that.
LOL, the idea of "a number approaching infinity" stopped me in my tracks. I thought at the time that that made as much sense to me as "a refrigerator approaching the Constitution" or "the color red approaching a trombone." I had zero context in why a number would behave in such an alarming fashion, rather than simply remaining steady in its designated value. Not to mention the zen state my mind went into in trying to imagine ANYTHING "approaching infinity." I didn't learn calculus in that class, but I sure learned a lot about meditation.