only played 3 games of it so far and got my ass handed to me on each occasion, for this i expect using mics and coordinating with your team pays off big
My first 3-5 matches were the same way, and then I started getting bonuses and upgrades to the weapons and skills. More to the point, I stopped lone wolfing it, and was much more survivable with kills coming pretty easily. The best thing to do is move to each supply box and craft, all the while reviving your buddies.
I hated the MP at first because I was getting stomped, but now it's a ton of fun. I haven't experienced this much tension since MW2 Search and Destroy.