It takes words and and only words to criticize any form of art. But it takes lot of hard work, focus dedication and sweat to make one. For every film maker making a film is just like giving a birth to a baby, and criticizing one is just like saying the baby is black, wheatish or ugly or fat. So we should accept every film/baby in its own individuality/identity and should not push over view good or bad on others. As everyone has its own taste to admire, what not appeal to you might do wonders for other. Beauty lies in the eyes of beholder.
