This deck suffers from a lack of focus, low amounts of true interaction, and slow turns. You need to decide if you're using the Snake *or* the Dragon, not both, and you need to find a way to ramp/draw to get things out faster while still being able to hold onto interaction. This thing either wants to be Golgari Ramp with the Throne set to Snake to run Caustic Bronco, or Rakdos Reanimator with self mill and Push//Pull and/or Coiling Rebirth. Not sure which would work better in Bo1 but trying to do both certainly isn't.
Do you know what I don't like of this build? That the thrones are overworked, I don't know what creature type I must choose half the time So I cut some 3 dragons and 1 War and put there the full set of Caustic Bronco, so I can always name Snake :D (Also less Irencrags and Loamspekers instead, to have more saddle users) I'm pleased with the result, the Broncos are sick in this high CC build