I have been playing this game for a while and I'm not new, but it's not something I play daily.  I can PVE with 100 kills and maybe 5 deaths.  However, when I PVP I'm getting 6 kills with maybe 12 deaths. The more aggressive I play, i wind up with 10 kills and 20 deaths.  Point is, I'm dying at a 2:1 ratio.

I seem to shoot players and they kill me with 1 or 2 bullets and I spray them with 4 or 5.  I'm dead and they have 17 life left.  Are there other things I can do to increase my XP per round?  I was thinking of throwing NBR grenades and healing teammates, or using LMG's and SMG's to injure and then run away. Of course hunting in packs makes it easier too. 

I'm not sure if I can't aim, or my internet connection is too slow, but I'm consistently getting destroyed by Paying players.

Weapons: RL / SG / SMG  (first shot from RL to the ground/legs with switch to SG)

Clothes:

Level 22-31 (with +3 Decreaser) Sturdy Hat, Short Shirt / pants / shoes

Drugs Liquidstone +21 (from BM) and medkit

Skills: Liquid armor for body, stunt grenade

Level 31-41 (with +4 Decreaser) Fine hat, Fine Shirt, Fitted pants, Fitted shoes

Drugs Liquidstone +30 (from BM) and medkit

Skills: Liquid armor for body, stunt grenade, edf

Very anoying impossible-to-kill setup

Honestly you dont even need BM boosts, since its a regular game, you can easily fare with 16-21-26 liquid stones, and there are other alternatives. IF you claim that you end up leaving your opponent with a small fraction of his hp everytime, you might want to try offensive boosts such as amplifex, however it seems that you have more of a problem with aim, and situational awareness. Always try to stay behind or near some sort of cover, and try to always aim at mid-upper torso and head with your crosshairs. There are also drugs that artificially increase your accuracy temporarily, you might want to try these. As far as skills, if you seem to be taking alot of damage, try getting liquid armor at max rank, as it reduces all damage taken to the body by 15%, which is a significant portion of all incoming damage from all sources. Another really easy way to get kills is with fire and explosives. Rocket launchers, seem to do the trick for most of the newer players, just dont forget to aim at their feet to maximise your chance to hit them. Fire is also very effective vs all players, as it does a consistent amount of periodic damage regardless of their gear and level. Well placed proximity mines also can rack up a ton of kills. 

Hopefully this wall of text will help answer some of your questions. XD

~SL1C3

I've been playing for a few days aswell, but my K/D is about 1.8.

Get fast finger movements and aim for their breat bone. If you've ever played Counter-Strike then you know what im talking about. In no time youll get harrased and belittled by BM members who you're rolling and their buffs arnt working since you can drop 10 bullets into their face with a semi-auto AR, faster than their LMG can shoot you. Also, learn how to use rolling and knife attacks.

also, get some augs for your gun!

best of luck