I understand your frustration because I feel the same. I expected something much better of him in this AO and I'm still in shock because that nonsense loss. I agree that he has too many distractions out of tennis and maybe he should be more focus and concentrate in tennis than in anything else and I'm saying that for more than one year
But I don't lose the hope, we know about his talent and his mentally strength which unfortunately has lost for awhile and like his team says: "it's more dificult to help him on that issue than when he was injury".
He played pretty good at the end of the year, he was almost there but...
Let's go to give him another opportunity, he doesn't like to lose and I know from good sources that the last loss it was the worst for him. Every cloud has a silver lining and maybe it was his definitely wake up call
In the other hand, yes, the rivalry between him and Federer has been the best in in this sport for years, both have brought the magic and emotion for all the tennis followers (and also the hatred, you know what I mean...lol) but I don't how long Roger is going to last and even he seems sometimes to be very fitted but never so good like a few years ego and behind
Meanwhile this is (or has been?) the Novak's time, he has not wasted the opportunity to play well and of course looking and knowing what is going on around him getting the confidence to the limit, good for him, but honesty I hope that someone else can bring him to the earth, someone that has the confidence to think that nobody is unbeatable, good mentality and strength of all the ways and competitive and I'm sure we'll see that soon