C´mon boys, nobody (as far as I see) is giving him a hard time here (not even putting him in a pedestal). Observations about areas were a player can improve are the one of the basic topics of discussion on a tennis forum. I actually kind of root for Zverev, and in general I root against the younger players... But I concede I have not watched him play that much, and was speculating more than anything else. From the little I saw, and from results, it seemed to me that way. The Nadal match instantly reminded me a match were Nalbandian had 5 match points against the same spaniard and lost 6x0 in the third...
And, yes, he is punching above his weight, that´s why he´s been steadily climbing in the rankings. And exactly because of it people now have expectations about him (even Federer expected to lose to him in straights), so yes, at every bad result we will see people complaining. But I guess most people here are wise enough to know that, with 19, time is on his side. Hell, I even think a guy 27 has still a lot of time...