[spillblood]

Yeah, the AI is the main flaw of the game. It was even worse in the first versions, has been improved a bit by the patches (most notably in the last one). In the unpatched release version the AI for example couldn't use nukes and could only make one attack per turn which gave it even more of an disadvantage as in the most recent version of the game, but it still needs improvements.
The first thing I noted after playing my first games in 2010 was that I won each game, I never lost, and even in the patched version you have to give the AI some advantage intentionally to have a real challenge.

It isn't really able to react to player's actions, for example it is totally helpless against massive nuclear attacks. By using nukes you can win each game so I avoided building them in the last games I played.