Couple Problems...

1). Overused riff with skratching.
2). YOu MAY wanna change the name from incest & angel to Infestations & angels before roachies get pissed.

Ouch

What exp-99 meant was cut up the sample and give it some motion with drops and chops. Unoriginal? Not by a long shot. It's rare to find anyone sampling alternative music for hip-hop. Repetitive? Last time I heard Nu-Metal or Hard Rock, it was the same 3 or 4 chord progressions...now that's repeitive. Don't sweat this. Learn from it.

Use instrumental motion to give it an edge. Put a fat pad in to delineate bars and give it progression. Use a strummed bass as an interchange when you drop the loop out of the background, then transition back to the loops for a big finale with a developing chop like the one you opened the track with.

Keep it up.

Peace

...

How do I put this...?

Repetetive. Unoriginal. Frankly, I hope this song gets blammed.

That said...

I like the guitar riff you used. The song's a favorite of mine. BUT you overused it. There is no variety besides a few extra small blips thrown in. This means there is no substance to the piece, which makes it dull. I had to force myself to listen the whole way through.

My advice? Be original. Use the riff as a basis, and take it from there. Instead of looping it, come up with original variations, transition to them, and make this piece have a bit of variety to keep it from being just a boring drag.