be mad at the Microsoft, or whoever decided that player matches don't count or that you can't play with your friends in ranked matches, but also at the gamers that make such a situation "necessary."
For the most part, gamers want to play with their friends, even if they are just people in their WoW guild or the writers of Penny Arcade. It makes no sense that if you want achievements you have to be matched with however XBox Live so chooses, and I think it hampers some of the system's multiplayer success, especially with very team oriented games.
Take Gears of War for example, it has a great multiplayer component. It's fun, it's very team oriented, and it has chainsaw bayonets. I remember one game where me, two of the writers here, and an old friend from my Chromehounds squad were playing togehter on one team. We easily formed two man squads that actually managed to pincer the entire enemy team into a warehouse and then proceed to systematically destroy them. That was quite possibly one of the best multiplayer experiences I have ever had. We were able to quickly communicate with one another, cover each other's backs, and we all rocked, however, we recieved no credit for it, any particular reason?
Did the fact that I was playing with friends make me shoot straighter or make me otherwise a better player? In short, no. But the fact of the matter is, there are those people who would use this system to pad their stats by forming a game with some friends and then proceeding to allow each other to do whatever they wanted in order to gain achievements, because, of course, your Gamerscore is some measure of your worth as a gamer and thus a person. It is because of these people that this unfortunate dichotomy exists so if you want to be mad at anyone, be mad at them.
In the end I think player matches should count, and if a few people pad their stats, I couldn't care less, they're already dead inside.