Heh, I got ripped apart in basic training and the first couple of days of social slayer too, until I got used to everything and learned strategies, etc. That's why my k/d ratio is still so terrible even though I've improved since I started.
Also keep in mind that there are a LOT of experienced players out there that just start over on new accounts (mostly just to rip apart "n00bs"), so matchmaking isn't always perfect at the beginning. I made a new account recently to see how true this was and my first day was terrible, it wasn't until I got up to sergeant ranking that I started having games as they should be.