It's too empty; bad not bad.
The song in general just sounds very empty and with a genre of music like Dubstep, you really gotta fill up the entire sound spectrum to please the listener. I can only hear the bass, the drums, and one extra sound in this song and trust me, that's no enough to keep the listener engaged. Moreover, I find it very hard to distinguish the so-called drop from the rest of the song, a drop needs to be obvious, here I can hear a vague build up and then the song kinda just floats into the drop, that's a bug no, no right there; what I would recommend is to do the drum build-up and then right afterwards, hit the drop and while on the topic of drops, add more sounds and instruments, like I said the song sounds very empty, I understand that you're new to music production (from what I can tell) so I won't really be to harsh on that, but do keep it mind for your next song.
All of that being said, I do like the introduction of the song, it feels like something big is about to happen. Also, the growls used song pretty good, in my opinion, though I would make them louder, in the song they seem to be ducking behind the other sounds, which is not a good thing; make the growl basses more prominent. So to conclude, not bad but it does need a lot more sounds, though I will say the sounds that are in the song are not bad and sound pretty darn good, just add more of them in your next song.
Wow, thanks for the review, man! I will try to improve at the next song.