It’s the micromanagement. When earlier games became tedious, I could just pick a quicker game speed, and I would suddenly feel like I was playing with more momentum. But in VI, it actually kills momentum, as if driving the slightly faster route to work at the cost of particularly frustrating traffic, since the most tedious micro isn’t turn-based, but city-based. You only have to plan districts/improvements once per city, so I find I can still have fun with VI if I play suboptimally (i.e., tall) on tiny maps and with mods that let me cram more civilizations into the game. I’ve probably put in a few hundred hours this way.