I have the same exact experience as you my friend. I am also .8 with all 3 characters. One major thing that happens is the damage referee. The first game I play everyday I know I am going to do good. Always positive kd. So I play and get like a 1.7 kd. Everyone seems to be easy to find and kill. It only takes a few shots to kill someone as it should. Next game here comes the damage referee, even if I am playing the same opponents. I did good the first game so the damage referee comes out and nerfs me. Now I am slower and it takes a full clip of shooting someone to even take their shield down. I think it's more of a matter of the damage referee than sbmm/cbmm. But yeah I have the same experience. Really good game followed by really bad games then throw in a really good game again. It is rare to have a few consistent matches but does happen sometimes.