I was looking at your stats on the leaderboard. You've got a good accuracy rating. My kill/death ratio is 1.10 right now. I started out horribly on multiplayer, but starting racking up the kills once I figured out the maps.
I haven't been on for a while, got tired of the whiney trash talkers and 8 year old ghetto talkers and the like.
I think one of my problems was my accuracy rating. I spot someone and try to close in and get a good shot instead of instantly firing all over the place from afar and end up getting killed from what I thought would be too far away to have any chance of hitting them with a machine gun.
I always did best on the Rust map, it was small enough that not knowing any maps didn't really matter as much. It's just an all out blood bath.