"...bloated, ponderous piece of s**t."
"This is so bad it's immoral."
"A great grinding garbage disposal of a movie..."
"Never in the field of blockbuster movies has so much been spent on so little."
"When the robots give a better performance than the humans, we have a problem."
"...the male teenage cinematic equivalent of snorting cocaine off a hooker's ass."
"...a horrible experience of unbearable length, briefly punctuated by three or four amusing moments. One of these involves a dog-like robot humping the leg of the heroine. Such are the meager joys."
and my favorite, from Rob Vaux @ Mania.com:
"Critics really are eunuchs in the harem when it comes to movies like Revenge of the Fallen. Calling it bad 1) misses the point and 2) makes not the teeniest bit of difference anyway. Provided the number of giant robots bashing each other compares favorably with those silly talking sections, it more than meets the expectations of its fanbase. You might as well spend your time decrying the nutritional deficits of Doritos or telling a room full of smokers that cigarettes are bad for them. Everyone knows. They just don't care.
The bizarre honesty of director Michael Bay constitutes a sort of saving grace. He doesn't try to disguise the fact that his film is soulless corporate product; indeed, he embraces it with such obvious gusto that it becomes an auteurial style all its own."
It really boils down to that; "Revenge of the Fallen" sells soulless to those who buy soulless. It's not shitty filmmaking; it's supply and demand.