Use to love playing Left4Dead... quit for the same reason. You couldn't even play the online games.
Something I never got, how fun can it be to "play" and all you do is run around killing everyone effortlessly.
Seems like that would get boring pretty fast.
One of the problem I'm having now is my old favorite is the Black Ops multiplayer which still has one US server (for all the maps) in Jersey. BIA is the clan that runs it though not many BIA people left.
I donated not that long ago to help with server expenses and the guy who runs it would pester me for more money, using every sales tactic in the book. He finally offered to make me and admin (trying to create a vested interest) I said no thanks. Soon afterwards I would be randomly kicked out of the game by the server, "go to such and such a site for server updates" (paraphrase).
Then again I was having some issues with the wifi on the gamer at the same time. Windows would randomly drop my wifi but that only happened three times when I was playing but the message was different. I am also wondering if the wifi dongle is going bad.