This is not a terrible film. If this site allowed a two-and-a-half star review, it would be about right. I'm giving it the benefit of the doubt because it's trying to do something well. Unfortunately, that something is imitating John Woo's "The Killer", and that's an incredibly stupid thing to do if you're not John Woo. The obvious failing is making the hero deaf since birth, and then giving us about 10 seconds of his silent world, but otherwise dubbing whatever ugly techno soundtrack seemed trendy in the late nineties onto a movie where we could be hearing literally anything, or nothing, to far greater effect.
The viewer also struggles to care about the protagonist. He's deaf and dumb, but since he's not retarded, it's hard to see why he's never learned to communicate with anyone else in the ways that deaf people usually do quite easily, therefore he has to shoot complete strangers for a living. This film is literally ticking the boxes of John Woo's "The Killer", except that instead of the hero's girlfriend being blind, he is himself deaf. And unfortunately it doesn't do it terribly well. Basically, if you've seen "The Killer". you've seen this movie ten times over.