Not sure what's going on with your mix but it almost sounds like you have either some phasing issues in the low end or some things that should have been mono youve tried to spread out too far creating a disconnect between the sound and its room, meaning that things sound out of place in the mix. I REALLY like the beginning, you do a great job of creating an atmosphere and shit sounds all ethereal and junk. Back to the phasing thing, I think it could also be a product of poor samples. Do yourself a favor and dig through /r/drumkits and find some nice samples that you like, you can get everything there from boi1da to 40 to metro packs, all good stuff, try sorting by most popular and grab some at the top. The virtue there is that you can use any sample if it has the sound that you like, but its always best to be able to start as close to the desired final sound as you can. Polish a turd its still just a shiny turd ya know. Good looking out, keep it up, work on the drums, but keep doing whatever youre doing with the ambient stuff its got an awesome vibe.