Sounds about like what happens to me. I am pretty sure that is mostly SBMM and the rest is just the fact that no one is perfect and we all make mistakes even the best of the best. My kd goes up and down between 1.2 and 1.3. What I notice is I will do really well for like a week then it's like Bungie is like "alright we need to put this guy back in his place put him against 2.0 and 3.0 kd players in every game mode for a week so that he hates destiny and is ready to quit. Then when he is about to break we throw him in a game against .5 kd players so he gets a we ran out of medals and suddenly thinks he is amazing at pvp. After that let him play against players at or below his skill for a week. Then we start the process all over. Hahaha this is how we keep them playing destiny." Evil laughs ensue by Bungie.