Good God, did anyone complain when you had to use that ugly square box thing that hurt your hands; in other words the NES controller. No people kept playing and having fun. I don't have a DS of my own, but I've played around on it long enough to get a good feel for it. Metriod was a blast, easy to control, and easy to hold....no problems there. I haven't played Mario or Wario DS, but I do have experiences with a PDA. When you write on a PDA it is easy to see what your writing while you write. I don't get your guys argurment really, to me, it seems like you are holding your stylus like a chopstick or something. I think mastering the DS is the same as learning how to use any type of controller that your completely new too. When you first held an NES controller, did you know how to use it well? No, you knew how to use it; but well...probably not. What about the light gun? You were probably not a natural sharp shooter when you started...sure you got the concept but i'm sure you felt it awkward to hold at first. Yet you became good at using it well, even if you had to partially cover the screen sometimes. The analog stick was just an extension of the D-pad and really didn't add anything new. What about double analog sticks for FPS? I'm sure you were horrible when you first started; everyone is. Mastering the controls is just as important as playing the game itself. Once you feel comfortable with controls you can start learning how to get better using those very controls. You may argue that it's harder with the DS, but that's just cuase of you and what you do for a living (playing videogames probably). Your too use to something else and the change is making you frustrated.
Once you figure out how to use the controller well, it's a rewarding feeling, and I think your just complain that it's harder than you thought.