This most certainly is deathstep, something I have listened to but have never attempted to create.
First of all, I think you could try changing the song structure of the drop section, because it seems like you have a single idea for every measure that you hold onto for the rest of the measure. Shift it up! Get funky!
I also find the change in pace at the drops jarring.
Sorry I have only criticism, but I think the cymbal and the open hi hat are a bit distracting. I'd notice it less if the hi hat were quieter (or the high frequencies EQd off) and the cymbal were hit less often.
I hope this helps! I wouldn't have said so much if I didn't think you should continue making dubstep tunes.

I very much like how you varied the song structure from one phrase to the next. My favorite part is :20, because it was pretty unexpected and brought out the next part nicely.