moulin rouge
One of the best love movies that only people with no heart say is a piece of shit, but only because they know they'll never experience anything close to love because they are heartless assholes in which nobody likes.
Example:
John: Moulin Rouge is a piece of shit!
Mary: You only think that because you're a heartless asshole that no one likes!
John: Moulin Rouge is a piece of shit!
Mary: You only think that because you're a heartless asshole that no one likes!