All this pointless bullshit about Kyrgios and Wawrinka's girlfriend aside for the moment, last night's match was the perfect illustration of what I meant with my initial post in this thread about Kyrgios.....
With his height, serve, power, and relative quickness, there is no excuse for him to have such poor results. But the reason he has such poor results is that his ground game is severely lacking. The slew of wild errors, particularly off the backhand, are why he lost, and that kind of sloppiness/lack of skill development is why I have a hard time supporting him. He cannot sustain a high level from the back of the court, not because he is unathletic (obviously), but because his feet are constantly out of position and he makes routine errors.
That problem has nothing to do with having a bad attitude or cursing at umpires or making crude remarks. He could do all those things and win big if his ground game was consistent and his footwork in setting up his shots (particularly the backhand) was better. It really is a shame because he could take over the ATP if those skills were in order. But they're not, unfortunately.