I haven`t played ctp2 a lot but I read somewhere that every game you play you play against the same AI countries.
To remedy this one can change this in ctp2_program\userprofile.txt.
First one have to play on one of the higher difficulty levels, Prince/Medium or higher. Then in
ctp2_program\userprofile.txt make sure NonRandomCivs is set to No.
Now you'll play against different opponents every time you start a new game.
It's never too late to say thank you. So I do.