if you play MW2 does this piss you off?

ill keep this simple by putting it into a situation. you just spawn in a search and destroy match, and you get a good spot you can see the enemy spawn. suddenly , someone with marathon/lightwieght/commando knifes you in the back, making you wait ANOTHER WHOLE ROUND, while someone gets a cheap kill on you.

does anyone feel the same way? i feel like im the only one getting annoyed with this.