Ehhh rank doesn't mean that much. I played cod4, and it was my first shooter game
EVER so it took me a while to get used to it, so I was like 5th prestige and still sucked. Eventually you should get better, but that's only by learning from what you did wrong. Some people do glitches and crap while they still suck so they unknowingly set themselves up to be harassed by people for not being good, because they are at a high rank. Some people play A LOT and even if you suck you still level up, so they could even be 10th prestige legit and suck really bad. Some people play it a ton, and are actually really good, those are the people where you expectations are based off of. And some "noobs" are people who just got it, and always beasted it on other games and it just translates for them. And for others (this is what I did) they make a dummy account they play on for a while to get the maps and the game down, then go on their main account to own people (it's fun making new account randomly too so you can dominate everyone and have them going crazy ;p).