Because the UI is pointlessly sleek and sparse (Because consoles on TVs cant assume you are close enough to read small stuff). Because the actual information available to us in graphs/advisors can almost entirely be inferred from what you already see. Because resources aren't as *important* as better *tactics* with a few *hero* units. Because the new buildings are like a skill level system only MORE depressing because there is a pointless trade-off when I already spent 50 calories smashing that next turn button to finish buildings.
Civ is has been my HERO for computer games since my half-bro taught me how to use 2 when I was like 7. I Liked the new stuff in 3 and was heartbroken that my comp couldn't play Civ4 vanilla. When I find a game at most as complex as our new generation Tower Defense games (which are incredible, try out cursed gems and protector 4) it isn't a civ game. BTS I had to learn things and play off my civ's strengths and try to gain military dominance during my UU window. Now I just have to pummel them with archers while gaining no tangible game-play difference for 80% of the Civ's special traits. Even if not siam/greece city states are worth most of your money. Most of the UB's aren't compelling, and ironically my favorite was floating gardens because it let me have Civ2,3,4-esque super cities on lakes, sadly that save crashed due to a power failure (not gonna replay 8 turns with this poorly optimized ai, I'm running crisis on max with 8gigs RAM but can't process a standard map turn in middle ages in less than 20 seconds? Pft
TlDr; Everything is too simple, I have casual mastery of all the new mechanics before a game is over.
P.S. I hate new civilopedia and luxuries need to be better or unhappiness needs a nerf. I can handle less policies if I can at least HAVE a big empire from time to time.