Pressing the homescreen icons and being able to select, for instance, 'video' or 'selfie' with the camera app is easy but the quick app switch feature and pressing the keyboard to move the cursor, who would have known about those unless someone else stumbled upon it?
I don't see what the big deal is.
It's like a new video game. You either go read what the controls are, or you figure them out for yourself. That doesn't make the game complicated. Neither does it make iOS complicated.