Ok,
1) The AK is not a noob gun. Just because it is the most powerful assault rifle in the game does not make it a noob gun.
2) You have to learn to use the gun at long range to be effective with it. Once you learn that firing on full auto simply does not work at long range, then you will take down enemies much faster than a k2 can.
3) CQC with an AK is easy (spray 'n' pray), and the lethality of the AK OWNS the K2 anyday
4) Have you tried the AK-103? Get it (its worth the risk of 4k) and tell me how the K2 can possibly beat out the 103