I feel your pain bro. I am still learning and not awesome at PVP but have gotten skilled enough to have some fun and pwn some newbs from time to time. At first I was just getting killed super quick and I felt so bad !!! I had deleted several exotic quests because I could not make it through the PVP part. Finally I said screw it and decided to man it out and see if I could learn. Practice with different weapons until you find the ones that work best for you. Pay attention to what your team mates are doing as well as what the other team is as well. It all pretty much boils down to practice and learning what works and what doesn't. Shout out to my homie NOOBSH8ME he is a boss in PVP