The lag is ridiculous. It makes what could be a great game an exercise in futility. There is very little skill involved and usually comes down to who gets the lucky spray and pray head shot and has a better connection.
One of the tips during a loading screen told me to "anolyse the the killcam" or something like that. I have. I've studied them to try and become a better player. I've learned that 2 bullets to the foot are more effective than a clip to the chest.
PRO TIPS:
1. Do not actually aim at the enemy! This never works and will only frustrate you. You are just going to get pissed off when he shoots at a tree and gets a head shot on you. Get a high rate of fire gun with low accuracy and spray AROUND your enemy! BOOM! Head shot.
2. Check the score board to see who is host. He'll be the only person with 4 green bars. If he is on your team you will win, but avoid him at all cost if he's not. He is invincible and is actually playing a different game than you that is running 4 seconds in the future. I'm not sure if this is a module you can unlock later or what.
LOL that is precisely what happens

4 second time warp module i want one

I have to whack someone 4 times with a meele but they just swing wildly once an i fall down lack i've been hit by a truck.......
Mother F**king Lag on the Mother F**king Game