VainoValkea
Emperor
You keep saying that like it's the gospel truth, and not just your own opinion of what the game should be. If Civ were meant to be a pure competitive game, the devs wouldn't bother with having AIs have different personalities based on their historical personalities, or having civs start on terrain similar to their real world geographical positions. Since these features cause the players to start on different - an not necessarily equally optimal - footings, a pure competitive game would eliminate such differences altogether.
A game like Civ, where one player wins and the others lose is a competitive game just like a Formula One race or a Olympic pole vaulting contest - except in Civ, there are no silver medals, only a golden one for the winner. It's good to finally have an AI that does at least a passable job realizing this. (edit: although it does a very, very poor job when it comes to preventing a player from becoming a City-State hoarder or a cultural runaway)
True, there are a few optional flavor elements, but they don't make the game less competitive. They don't alter the fundamental truth that another player's victory is your loss. The AI personalities don't make them shy away from the path to victory, but define which way they pursue it.
I think you should just accept the fact that Civ V's diplomatic model is more gamey than that of the earlier establishments, because that's the way it was intended and not everyone considers it a failure simply because you do.