I must be playing a different game to most people. I just ended a campaign as Prussia on Very Hard/Very Hard and the AI just would not declare war on me. I never like to initiate war and by the time 1750 came around only two factions, Courland and Poland-Lithuania had declared war on me but I'd only gained three territories from it because the latter asked for peace soon after I took Warsaw.

Anyway the point is, my problem is that the AI doesn't declare war enough! I hate being the badguy to instigate conflict and since the AI won't do it I simply run out of years to win.