So my friend has one... He wears down the exact same spot on all his controllers... left thumbstick at 7'oclock. He's just pressing too hard.
However, I am very gentle and precise with mine, and they have suited me well. *HOWEVER* the right thumbstick, when pressed in, is starting to flake out. If I press it to run, a lot of force is needed, or else I will stop running. So that controller is basically useless now.
And of course, I have to say that as for right now, the touchpad is absolutely useless.