"Besides, multiplayer isn't about completing objectives or capturing flags, it's about being the best."
For you and your lonely ego, maybe. Some people LIKE team play, and the increased strategy of working effectively as a unit.
People w/ that attitude crack me up... you see it all the time in CTF matches, the losing team has a guy that has like 30 more frags than everyone else, because he isnt paying attention to the objective, and just running around killing at spawn points, or whatever.
This is good news for you though, you can just continue to play nothing but Q3, you wont even have to upgrade your hardware for the next gen games.