I am inconsistent too sometimes mate. Sometimes i go 10-2 in trials and sometimes 2-8. You will have your bad games and you will have some good ones. I still go flawless 3x a week though so dont let that get you down. Thats why there is 3 people on your team. Some games i own and my team mate does bad and other games my team mate will do amazing and me terrible. But kills isnt the be all and end all as one game I have gotten 9 assists and 1 kill. As long as you work together and are winning, that is all that counts.