Wall camp and use a shotgun. Follow around someone on your team that does well and kill whore. Use an annoying super like blade dancer or storm caller or hammer of sol. Use grenades that can get insta kills, like sticky grenades. Run away from gun fights you aren't going to win. Use a rocket for a heavy. These are all the tips you need to go well positive in destiny pvp. Basically think to yourself, "how can I play more like a little bïtch?" Then you'll do a lot better.