Let's not be naive here. He doesn't always believe it's out of his hands. He keeps his answers curt for several reasons. He doesn't want to come off as a jackass who doesn't recognize his opponent's success; his command of English isn't great; he's reluctant to analyze the match for anyone's else's benefit.
It's not like he doesn't try to improve. He's done something right in order to stay #2 for this long. If he was content to merely give credit he wouldn't have improved on grass and hard courts over the years. You're better than that, Scoobs.
I'm not saying he's not trying.
I'm saying it's not working.
And I'm saying that perhaps he needs to be a little bit less generous with the credit and perhaps a little bit more hard on himself for not finding ways out there to change the pattern of the match.
Set 3 was the same as set 2 was the same as set 1. No plan B.
If you're the world #2 and you're being beaten by someone who is playing tremendously well, you either accept it and go down in flames or you try to find a chink in the armour - this may involve you getting out of the comfort zone more, but you should be trying all sorts of things.
Different serving positions, varying where you return, getting to net sometimes as a surprise, changing the pace a bit sometimes.
And it's no good just doing it once, you have to persist until you're sure it's not going to work.
This, more than anything, is my criticism.