well for you first...
it's not too bad until the drops. the piano part is beautiful. the rise and drop is perfect but, as for the heavy part it really just nonsense. believe or not dubstep does follow very complex music patterns and theories. some few parts i would leave in there, but most of it get rid of. i don't know what program your using but when it comes to dubstep 98% of all the composers use native instruments massive. you can grab that anywhere online and use it as a vst plugin (like pt fl or god help reasons). it's as much as a "must have" as a distortion pedal is to a metal guitarist. and maybe drop the kick down to about c4 to give it a deeper thump. but i will say it does have potential. My first one wasn't great either. took me a bit to really merge my style into this genre. I will say your braver than me for putting you very first one up. i think i erased my from existence. just keep at it i'm sure at least by the third one you'll catch that filthy bug.