I have a recommendation for everybody who bought the game and is dissatisfied with it. It works with every other game that anyone else has been dissatisfied with for the PC and has worked for me in the past.
Stop talking about it and quit playing it. Don't buy DLC. Don't buy expansions. Don't buy future titles. Posting on forums only spreads awareness of a product and, in turn, even if the awareness is negative, people will buy it 'just to see'.
Buck up. We've all made purchases we regret. Take your loses and move on. Don't buy another Civ. Play Civ4. Whatever. Complaining about something that is free is an even more absurd thing. Stating that you're getting something for free when other problems exist is like saying "You know, the visuals in this animation are great but the sound just doesn't cut it. They should have spent more time on the sound!" Who is they? The guys who did the animation?
Don't assume that content people are the same people who fix bugs.
Ugh.
ETA: It's one thing to say "Yeah, this should be changed." It's another to say "This game is awful."
ETAA: I don't buy the argument that 'people are not satisfied with the game.'
Current: Peak:
47,748 72,400 Counter-Strike: Source
44,545 70,662 Counter-Strike
39,249 69,059 Call of Duty: Modern Warfare 2 - Multiplayer
27,267 40,930 Sid Meier's Civilization V
19,041 29,317 Team Fortress 2
17,234 22,868 Left 4 Dead 2
14,145 17,327 Football Manager 2010
5,945 8,790 Empire: Total War
5,390 8,738 Garry's Mod
4,853 7,281 Condition Zero