I'm not surprised that this film has gotten so many bad reviews, although this is not to say I agree with them. I contend that Shatter Dead, although obviously not professional looking, is a brilliant film.
Yes, it was shot on a low budget. Yes, it was shot on video and not film. Yes, the sound is low quality. NO, THESE THINGS DO NOT MATTER.
What matters is that there's (a) a very creative take on the zombie genre, (b) a script with tremendous depth that works on multiple levels, (c) many clever lines (that also work on multiple levels), (d) many powerful scenes, (e) a profoundly haunting mood that permeates the entire film, (f) a fantastic musical score, (g) a sharp and dynamic visual style that defies the low budget, (h) well-developed, memorable characters, and (i) efficient storytelling.
If you need your films to have bright colors and celebrities and pop music, then you will not like Shatter Dead. But if you're looking for something that's actually innovative and meaningful, then perhaps you should give it a try.