

You have no idea if China did that. If they had, they would have taken great efforts to cover it up, and could very well have succeeded. It’s a small wonder we know any of the terrible things they did, such as the genocide they are actively engaging in right now.
Civilization 4 was good at launch. Naturally it got even better over time.
Worth a mention that 4 is the most recent of these games released primary on physical hardware. That meant patching was a more difficult process so they actually had to hire a bunch of play testers to test stuff (and fix the problems they found). Contrast that to the approach of the most recent three games, which had their customers pay $70 for the privilege of being beta testers.
This is a shitty way to develop games. We should be mad about it because we deserve better.