Love him, hate him - you can't disrespect him. He stayed in the shadows of Federer and Nadal for 4 long years but his iron-will, endless reserves of energy and movement of death have got him to where he is.
He has not had it easy like the other top players taking advantage of a weak era or a particular surface, but all his powers were built over the years, and has done it all, the hard way, all by himself (with Marian Vajda's cameos).
He deserves to be at the top.
Deal with it, MTF.