I have not seen Waqt and so I am not going to comment whether the film is good or bad or whether the critic has done his job right, but all that I would like to tell you is that according to the Websters Encycolpedic Dictionary of the English Language, a critic IS defined as a FAULT FINDER.....
I think you will agree with me when I see that that is a far better source of explanation of the term than you can ever be!!
A film should be reviewed for what it is and not for whom it is aimed at. When you are evaluated on your physics answer paper, you are marked as to how you have answered your paper and not how well one particular teacher would havefound your answers!