AI when it's your ally and they have the largest army in the world: uwu i'm just a smol bean don't hurt me
AI when it's some dipshit minor whose independence you're supporting: LET'S COMMIT FUCKING SUICIDE HELL YEAH LEEEEEROOOOOOOOOOY JJJJJJJJJJJENKINSSSSSSSSSSSSSSSSSSSSS
I swear to god EU4 AI has one mission, one goal, and it is to piss off the player. There is literally nothing I can do to make this winnable, at all. I could hire every mercenary on the continent and they would all just be mulch
EU4 is one of the few singleplayer games able to give that feeling of spending hours having almost no fun whatsoever, normally reserved for competitive multiplayer games.