in all fairness the AI is more retarded in EU4Making a dumb AI and giving the AI lots of bonuses are two sins. They don't cancel each other. You can't say the AI is necessarily dumb because it has many buffs and it has many buffs because it's dumb. There is only one way causality between them: AI is dumb first, AI gets buff then.
EU4 at least tries to limit the extent of this.
cmon...
-AI accepting to carry you through wars basically (like allying france as an OPM)
-AI not declaring peace until 100% warscore or fully occupied
-AI having 1k stacks everywhere
-AI suffering massive amounts of attrition from bit army of stationed troops in a siege or even peacetime
-AI expanding too slow (in civ you can up the settings and they expand faster)
-AI honouring alliances when obviously they'd get fully occupied and basically probed
-AI going into debt over silly wars which should be easily won without taking loans (like Poland/lithuania+half of europe would hire mercs and send all they have to siege the OPM theyre at war with, so half of EU would go into debt over war with one province)
I mean cmon the list is endless