I still enjoy the gameplay of Civ. What the poor AI has done for me is made me adjust my expectations of what I’ll get from a Civ game. My guess is that I got at least 1000 hours each from Civ 1-3, and at least 2000 from Civ IV.
Steam says I have 722 hours of Civ V, but that probably included 5-10% idle time.
I only have 151 hours from Civ VI, even though I like Civ VI more than V.
Now maybe if Civ IV came out today I wouldn’t have the enormous amount of hours that I put in back in the day. I play a greater variety of types of games now, with more games at my disposal. Still, I enjoy firing up Civ for a game or 2 before it goes back on the shelf for months.