I know, this is a particularly difficult topic, but i beg to look unbiasedly into this. I've played 3 games so far in 4-20 patch until industrial era, single player and multiplayer. I'm not sure as to what it's causing the massive leaps in unhappiness, but they happen every so often, like in my current multiplayer game it took me down from +22 to -22 in 3 turns, in a 16 city, tech leading, culturally leading and religiously leading empire. More than half of those cities have every single happiness producing or unhappiness-reducing available building built, the others are close to it. So it's definetly not a matter of "gitgudnub". In addition, it looks like no empires in the game have a positive happiness. I've realized the needs increased immensely, though what i actually noticed, is that my luxuries never reach the threshold or, maybe the threshold changes when it desyncs or something, i dont know. I did not actively observe this in single player. It most definetly looks like a bug. Example: Spoiler : Barbs are everywhere rioting in my eden, eating my workers, and in 7 turns, cities will start flipping. Tbh, if this is how it's supposed to be, then this is not fun at all.