In all honesty, if you were set to play people of your prestige only, it would lead to a lot of exploitative dirtbags reseting their stats to play the bad players. What you really want to do is get more knowledge of the game and how things work. Try watching some YouTube videos from Drift0r, XboxAhoy, and Tmartn to learn a little more about the weapon's you're using and the maps you're roaming on.
This game has a very small skill line, and, in perfect honesty, comes down mostly to positioning and map awareness. Don't get me wrong, gunskill plays a hefty part when in a multi-man confrontation, but usually, one on one fights are won not by the better but the smarter. Always try to fight your enemy on your terms, and you will win 90% of the time.
Learn the guns, learn the maps, and learn the spawns, most importantly. A commonly overseen concept of Call of Duty by less aware players, spawns change dependent on your team's position on the map. However, BO2 seems to only flip when there are two or more from one team in the empty enemy spawn zone. This leads to awkward spawns often, but can also lead to advantageous positioning and free kills. Be aware of when the spawns flip, and you've instantly got an advantage over half the people playing this game.
Best of luck, mate, and remember, it's just a game.
Soon to be hosting Critical Hit game and movie reviews via YouTube.
It seems like you're playing too many objective game modes, play stuff like TDM and Kill Confirmed until you feel a bit more comfortable. Generally objective game modes, especially Demolition/Headquarters are full of parties that go for high kill games.
Also what class setups are you using? Sensitivity?
what you want is a ranked playlist. so good players play good players and crap players play crap players. i feel your pain. i hate playing people who have better unlocks just because they have played longer. give it time and youll get better. when i started this game my k/d was .4 after a few days of playing its now over 1. helps that ive played the same few maps over and over.