So glad you mentioned this I haven't seen anyone else talk about it. I quit playing this game because I couldn't sleep afterward. So weird nothing else has ever affected me like that
Trying to work out which of my colleagues would betray me, and what the best position for my units for the next turn.
I don't consider myself particularly competitive, but the need to minmax was strong with that game, and the social/diplomacy element was just infuriating.
An interesting GDC presentation on a similar subject: https://www.youtube.com/watch?v=t9WMNuyjm4w