The Starcraft II beta is kind of horrifying--their excellent matchmaking ensures games are always very intense. Pardo actually commented on this at the Game Developer's Conference:

"If your matchmaking is really good, it means that for every single game, you're kind of the edge of your seat," Pardo said. "After you play an hour or two of games like that, you're kind of exhausted. So we're actually talking about, 'Is that the right matchmaking approach?' You might want to add a little sloppiness to the matchmaking. Maybe that means sometimes you get stomped, but sometimes you have easier games. And sometimes you have the really competitive games. It's got better pacing.

(From http://www.escapistmagazine.com/news/view/99211-Battle-net-S...)

So there's that interesting human element there--how wide do your want your matchmaking algorithm to get? Personally, I enjoy the nightmare intensity; it means I more easily get my fill for the night. Is only being able to play a few games at a time actually a bad thing? I guess it might be from Blizzard's perspective.

If you're in the beta, try playing 2v2 with a friend against the Internet. If you're losing you can at least lose together. Think of it as a co-founder ;)