Just eat LOADS (like 10 items one after the other) and you'll soon get better.
I found an M4 last night with 60 rounds of ammo, and also a Hunter's backpack. I decided to swap my kit over to the new pack (it was slightly smaller than the hiking rucksack I've got, but camoflaged instead of bright red) and the server kicked me out while I still had my entire inventory all over the ground.
To top it, I couldn't remember which server I'd been on (the 'History' tab needs some timestamps), entered the wrong one (so lost all my stuff), and got killed as the room I was in was full of players as I joined.
FML.