Due to the internet, lag and latency, what you see on your screen isn't actually what is happening, you are essentially towing a little target around behind you.
When that towed target gets hit you get hit and depending on the difference in connection between you and your opponent the further ahead he is of what you see and the further behind you are.
Which is why I say, If you see a nose pointing towards you inside 600 yards, he has a gun solution and if you are not doing enough to avoid his nose pointing at you, expect to get hit.