It's a game that claims to represent the last 6,000 years of human history, it would be absurd if there wasn't a war at some point. If your criticism is that it's impossible for the player to stay out of conflict for the duration of a game, that's not true, I've done it several times. Just build up a decent military, don't make any declarations of friendship unless absolutely necessary, and keep an eye on the other civs. So long as you're not bordering a crazy warmonger like Montezuma, it should be possible to avoid attacks. I agree that the warmonger system is a little dumb and doesn't take proper account of defensive wars. Personally, I think Civ VI should adopt the diplomacy system of the Europa Universalis games. If you capture a city, you wouldn't automatically annex it, but could choose to keep it when negotiating peace terms. If you don't want a warmonger penalty, let your enemy keep the city and demand gold reparations instead.