I can see some of the frustration. I downloaded this myself yesterday and went right for the tutorials.
One thing I didn't understand was their default use of the motion sensor in the controller, I think that actually was MORE clumsy than anything since I move my wrists around while I play. However, being able to shut that off was huge.
Another thing I noticed is that without a fully detailed "controller scheme", its difficult to know how everything works. I checked multiple times, but couldn't find anything that told me by clicking L3, that it would go between "mouse pointer" and "controls". Finding this out solved so many frustrations, but really, this is something that should have been detailed from the beginning.
Another issue like that is the cycling view. Its confusing when you hold L1, and hit "D-pad DOWN" and that shuts your engines off, but if you just CLICK L1 and Dpad DOWN, it cycles your focus. Twice I had to quit a tutorial because I couldn't understand why I kept getting focused on the sun until I figured this out. A tutorial should exist JUST to tell you how the buttons work, otherwise you're stuck doing trial and error until you figure it out. Now, its not as frustrating when you're in tutorials to figure that out, but I can see the massive frustration if you attempt to go right into the game and figure it out as you go.
The other issue I've personally had was understanding why there is no tutorial for re-entry or how to connect orbits. In the get to orbit mission, you complete that, and then it says you can send the capsle back to earth if you wish. How about actually showing me how to do that? I attempted to do that and actually skipped right back out into space after briefly starting re-entry. For Orbits (yes, I did the orbit tutorial prior), I am doing the Mun Part 1, and it says that I should align the orbits. I spent 20 minutes adjusting manuvers trying to do what it wants me to do, and couldnt' do it. The programmers have to give more detail on what they want.
Overall I think its a great game, and once you figure out how to do everything, I'm sure it will be even better, but really...PLEASE add more detail to the tutorials.
Finally, I have no problem with moving the mouse pointer with a joystick. If I want to click something, quick L3, do what I need, then L3 and back under control. Maybe its because I play PS4 and rarely touch a computer, but I don't think its that bad personally.
One question I do have though, for the visual settings, I believe it is UI Interface that is turned down entirely, what is that for?