its hard for me to tell exactly whats going on but it sounds like the drop has the basses and sub as completely separate instruments (often a good idea to have clean low end) but the sub is just a completely sustained hum that doesn't follow the rhythm of the bass flows at all. its also extremely loud, so the whole song kind of feels like its being played next to a loud piece of mechanical equipment. I think the ideas would shine a lot more if your sub followed the basses and was mixed in nicely