I died ONCE on that mission, other than that I don't understand what you are doing. Just stay behind cover and shoot the bad guys, don't stay out in the open, apparantly they can aim
I think the SP is pretty cool, somewhat like COD yes, but it's much better directed I think, and the action is fun.
The multiplayer is good as well, been playing a bit. Seems to be some lag on some servers, wish there was a way of filtering out laggy servers (even though they have good ping).