Pretty much what others said, it might be frustrating when things go wrong, but if you outsmart AI eventually and come out on top, that's when you get the rewarding feeling.
My main cause for giving up games so far were..truces. in 1200s I reach bottleneck where there's barely anything to do. I could marry my kids for power and conquer whole Europe through that, but I rather avoid that as it's hardly believable that King of blabla would marry his daughter(heir) to my son for no reason, hence giving me kingdom with same size or bigger than my own.
My main cause for giving up games so far were..truces. in 1200s I reach bottleneck where there's barely anything to do. I could marry my kids for power and conquer whole Europe through that, but I rather avoid that as it's hardly believable that King of blabla would marry his daughter(heir) to my son for no reason, hence giving me kingdom with same size or bigger than my own.