Sure. iPhones and the Apple desktop OS. In both of them, I am lost as to how to accomplish anything but the most common stuff. The design of the OSes is such that it's not obvious how to do anything, and they provide very little guidance. You have to already know how to do what it is you're trying to do.
This is even worse on Apple smartphones, because a lot of stuff is done using mystery gestures that you have to already have memorized.
Skeuomorphism used to provide a small amount of relief, but since that's gone out of fashion, it eliminated even those clues.
In short, I find Apple's user interfaces to be very opaque. In fairness to Apple, this is also true of Android, Windows, and Gnome. But in the case of Android, it feels intuitive to me simply because I've internalized how to do the stuff that it gives no hint as to how to do.
This is even worse on Apple smartphones, because a lot of stuff is done using mystery gestures that you have to already have memorized.
Skeuomorphism used to provide a small amount of relief, but since that's gone out of fashion, it eliminated even those clues.
In short, I find Apple's user interfaces to be very opaque. In fairness to Apple, this is also true of Android, Windows, and Gnome. But in the case of Android, it feels intuitive to me simply because I've internalized how to do the stuff that it gives no hint as to how to do.