I average above a 2.0 most games, let me tell you how to 'get gud' ... bait your teammates. Seriously. I helped my brother do his quest yesterday and he's below a 1.0 usually. Start playing cautiously - don't hide - but let your better, or more confident teammates rush out and you clean up. I would rush out and purposefully die and call-out where I died and who killed me and he would kill them. Worked like a charm. Mayhem is best for this quest, you don't even have to have any gun skill whatsoever. Good luck.