Bloody hell, this sounds menacing. But moving on...
The drums could use some beefing up. Try layering the kicks and snares with something heavier. Also, hi hats.
That vocal clip at around 1:02 is a bit too long. If it was used in the later parts (more energetic parts...if it had any more), then it would probably fit in fine,
The energetic bit could use more energy. Get a low, gritty/distorted bass in there (or if there's already one, fatten that poor skinny fella!). And sometimes the beat skip doesn't sound nice (before the 4-to-the-floor beat).
TL;DR
Hook this track up with the sloppiest couch potato you know and get this sick filth real fat.