Acken
Deity
I think also the poor balance makes the problem worse.
The AI is bad enough and when you bring OP options into the game, it just can't handle them. . I mean I'm sure good players roll the game with any choice, but it becomes really apparent, especially with those DLC civs....
I mean currently I haven't even finished a single game before 1800 and mostly Prince games, meaning I really don't get most of the game's mechanics yet, but I can still, say, start a deity game as Scythia and take out 2 neighbors and still grab the pantheon of my choice, because, well, who cares about how well you can choose and place districts when you can capture a bunch? And thanks to the AI's production bonuses, capturing a city will always be better than making your own. Theater squares are for suckers. And apparently the DLC civs are even more god-moded, though I guess I haven't seen that firsthand.
This.
Balance issues amplify AI problems when said AI is not being "taught" what is good and what is bad.