This isn't a simulator.
No, it's not. But the things that drive wedges between the civilisations in the game are the same as those in real life. They could use some tweaking in places, but I don't personally believe that any of them are completely game breaking or in need of removal. The only negative diplomatic modifier that I wholeheartedly disagreed with was the one that punished you if were attempting the same type of victory as an AI civ, but that was removed in G&K.