This applies to the real humankind as well, but rn I'm venting about the game
My 3rd play-through, each time I had to just give up because bugs just pile up. Can't make peace, can't make war, this last time the game told me my civilization had fallen when an AI captured the last city of another AI...
You'd be surprised what gets missed in-house. That's why it's often good to send it out to thousands of random people.