I ran into the same thing. My friends though told me to just keep going. My kd while still low is going up. I find that now when I play alone I end up on or near the top of the leaderboard. Do I still have my 4 kill .47 kd days. Yep sure do but over all I'm getting better. Mostly because my friends were more concerned with me learning and having a good time then there win/loss record. If I were you I'd talk to my friends and just keep trying.