I agree it's hard but persevere and you can do it eventually. I play a hunter so had to rely on weapons only and I am also pretty bad at pvp (seriously I have an average of 0.6 K/D). Took me a while and was frustrating after sometimes dropping 30-40 points after a match but I got it in the end. I also don't quit a match just cause I'm losing heaps. I found if I was having a hard time and losing a bunch just had to walk away and come back another time. I've also done the pvp parts of both other exotic bounties too, doing all 3 at the same time helped :) Now I have to try the next bit....Good luck. P.S> I used all green weapons from random drops - fusion/sniper depending on map size and rockets.