Oh god the suicidal wars is a huge thank you for getting rid of. First time I got declared war on by a particular country was unexpected but cool, and I took a bunch of their provinces after beating them. The second time they did completely ruined my plans while at the same time giving me another opportunity to beat them easily again when they were down to TWO PROVINCES with myself somewhere around ten and my allies being moderately large/powerful countries.
Funny thing, I almost never got declared war on before this often even with coalitions and AI high. This time it just seemed like the AI went to the future, read and saw the Charge of the Light Brigade, and thought, "We should emulate these people in our diplomatic policy."