I believe there are certain segments of the Indian fanbase that are so invested in Sachin's career that they simply can't accept the possibility that there may ever be a better batsman than him especially so quickly after his retirement, even though they are blessed beyond belief that the heir to his throne still plays for India.
They latch onto every shortcoming, nit-pick minute details and hold Kohli to an even higher standard than their idol because after all "Kohli is blessed with a great support-cast, while Sachin played with Chunnu, Munnu, Pappu and Rasheed." Therefore, Kohli is expected to score a century every time he comes out to bat, and if he does and India lose the game, then the pitchforks will be out for Kohli's captaincy even though statistically everyone knows he will end up as one of the top 3 captains in Indian cricket history once he hangs up his boots, while Sachin as captain..well, less said about that, the better.
It's almost like rival fans value and respect Kohli more, similarly with Dhoni, because we've all experienced first-hand the pain that these two have inflicted on us over the years. They have been so impeccable that the pain has now turned into a begrudging respect and for some pure fandom.
I stayed well clear of this thread but it was great to see level-heads prevailing. If anybody is still doubting whether he's in a decline or not, check this :
Today marked Kohli's 10th century in 25 innings. Let that sink in.