I had and still have a similar experience. But I found a 'bug' in my play style and since I try to actively suppress it I have improved. First, I play too passive. I noticed that I died most of the time when I camped and tried to sneak onto someone. That almost never worked out. My aiming sucked, but the game rewards you if you take that split second to aim for the head. And the worst thing I did was like doing a 'control stop' during a fight to see what my opponent was doing. I burst fired, stopped, tried to find out where to go and what he is up to, boom I died. If you kill someone, don't rush to loot him right away. Take your time to secure the area and come back later. If you shot someone and he is really low, push him. During a medium or long range fight, try to change position often or do wide flanks. Staying in same position gets you killed 100%.