Awesome source choice. Basically, Gario hit the nail on the head with his feedback. The rhythm guitars could definitely be tamed more (filtered). Also, if you're double-tracking the guitars, less distortion can actually give you a clearer sound whilst remaining heavy. Getting the balance of the drums and guitar will sort out the pumping/overcompression. The snare sounds great but is far too isolated and removed from the rest of the track. Getting the guitars under control will really do wonders by being able to have the snare at a lower level but still cutting through. The lead that does play, is far too buried beneath the rhythm guitars.
To summarise:
Ease up on the distortion a lil bit
Tame the guitars more with some EQ and filtering
Lower the snare, also perhaps reduce the reverb a bit or shorten the tail
Arrangement needs more going on if its not gonna be a cover
This is a really great start and really hope to hear you build and improve on this. Even if you completely disregard my feedback, it'll hopefully get you thinkin' about it what you can do to refine the mix/arrangement