We are talking about Madness
You should either play [until you win/lose/find a sub] or set nation to AI. I'd prefer first option, but AI is better than staling for sure.
I don't want to take part in that small flame war we had here, but maybe you should try playing in less games, but sticking longer in them, even if things go wrong
It surely improves relations with other players and helps with diplomacy later.
P.S. Huh, I was sure it was chris writing it, not Jim :P