Let's make a list of all the non-technical complaints against Civ4 when it was first released.
1. Now founding a city may immediately decrease your income because of that "maintenance system"

- WTH, how stupid is that???
2. Dumbed down combat system, only 1 value, no attack/defence more

- what are we, console kiddies???
3. The Civic system is so messy and dumbed down - now you can pick the best stuff like in a cafeteria, instead of taking both the bad and the good with the complex, but accessible Government system in Civ3.

Why, Firaxis, why???
4. Animals killing units

, WTH???
5. No Portuguese, Byzantines, Iroquois etc.

Why??? Why remove civs???
Continue on, please.
Note: I don't think that all criticisms against Civ5 is invalid, but it's fun.