tips for anyone having troubles
make a class with fast hands and c4
throw the c4 down at your feet, blow it up
repeat until game is over
do this for like 3-4 games and your spm (score per minute) will go down (you can do it for more games if you want to lower your spm a lot)
and in bo2, the new matchmaking system matches you with people who have about the same spm and w/l ratio as you
quit the game, restart it, go into a lobby, profit
i did this a couple of times and the next games after i got like what niven gets on a regular basis
the only downside is that once you get that good of a game, your spm starts to gradually increase
so it's not really effective for many games