NIce overall.
My recommendations:
There are some spots where the notes of melody don't mix with the chords.
The beat in the first bit has a kick that is a bit to thumpy.
The riser is not particularly tension-y.
The drop is really good, IMO. I really only have one thing to say about it: The wubs take up too much of one EQ space.
Overall, good piece, some theory and mixing problems. Overall good, though, like I said.

So some things about this...

If you're not EQ pocketing, then you should start doing that. EQ pocketing is somewhat self explanatory. In dubstep, one example I can think of for EQ pocketing would be making room for the snare to sit well with everything else frequency-wise... y'know? I think you get it. That same kind of technique needs to be applied to a bunch of other stuff. For instance, if you're making some kind of melodic dubstep thingy, and you want to have a lead playing at the same time as the chords are playing, what you can do is use that same principle of making room for one thing by carving out of another by taking some frequencies out of the chords to make room for the lead. The exact frequencies, of course, depend on where on the spectrum the lead sits. This idea is very important to mixing, so use it.

Continuing with the mixing theme, the idea of a three-dimensional mix might help you out. Up and down is volume, left and right is panning, and back and forth is "apparentness." That final one is the one that I think is most out of whack here. To push something back in a mix, you have to use spacey fx like reverb and delay. To bring something forward, things like compression and distortion will work. In this track, I'd use that idea to push some things back, like the sidechords in the drop, and I'd probably push that guitar in the beginning farther back. (I can hear the delay on the guitar, but it still sounds rather apparent in comparison to the actual melody. I might compress the piano tbh.)

Finally, there's the drops, which are... problematic. There's a bunch of ideas that can help with this sort of stuff, things like getting straight what the chords are going to be (they should mostly never change) and keeping in mind how exactly the listener's head should nod during the drop, but that doesn't help if you're not too experienced. A person isn't that great at dubstep until they've gotten a BUNCH of songs under your belt, and I mean 50+ songs depending on how fast they learn (and how fast they can make themselves learn). I only see that you've made 13 songs as of posting this one, so just keep it up, keep failing, keep learning, and keep wobbing... or something.