I'm pretty good at it myself. I don't have trouble getting over 20 kills and under 20 deaths when running the DSR or ballista. It's just that so many times everything seems unfair and I have to do my complete best to win using a sniper rifle.
Like I stated running around with an SMG is just more or less the way to go in this game.
it can will infuriate and thrill you at the same time.... I lost all of my specialised optic calling cards because of the local glitch, so I started earning them all again last night. I've got the DSR with the dual band on and the iron-sights Ballista. I hadn't sniped in ages because I was working on getting diamond for all of my other guns, so I was a bit rusty first couple of games back, but once I found my timing again the rage messages began to flow from the other teams.. how beautiful it was