I feel like that's sorta where we are in America. In the glory days of the 50s-70s, people wanted the game to continue - they were willing to sacrifice a little bit of winning for the sake of keeping the system intact. Then starting in the 80s, people gradually started sacrificing the game for the win, doing things that they knew would eventually lead to the collapse of everything so that they could come out on top. This is corrosive. Once it starts becoming apparent, everybody will start sacrificing the system as a whole for their own personal gain, because the system is dead anyway.
I think we're right on the brink of everyone realizing that the system is now dead, and bad things will likely come of it.
Perhaps a more mathematical framing looks to game theory, a la John Nash. In the prisoner's dilemma two equilibrium exist, the "good one" where the prisoners cooperate, and the "bad one" where they both defect. Good and bad is determined by summing the outcome value for both prisoners. Social norms help stay in the "good" equilibrium despite the occasional defection. Once the defectors learn how personally profitable it is to defect, it becomes common practice, the norm changes, and the society as a whole has switched from one equilibrium to the other, and society is, overall, much worse off. The path from good to bad equilibrium is incremental, cumulative, just like pollution. It's less clear to me what the incremental, cumulative path is going the opposite direction.
Incidentally this also points to the path from a bad to good equilibrium. You have to throw away the big system and start with a system small enough that the participants will interact repeatedly. This rebuilds trust. Then you have to defend that system from outside influences, or at least carefully control them so they play by the same rules as existing participants. The act of defending your local community also builds trust - arguably [1] post-WW2 U.S. social cohesion was actually generated by the experience of defeating the Axis powers and then getting enmeshed in the Cold War. Finally you can gradually expand the system through carefully controlled immigration and naturalization.
Unfortunately, this probably means that the Internet, globalization, and likely large states like the US/China/Russia are all toast. And as Terence Tao's post here points out, large organizations are usually more efficient than small organizations. That means that as large organizations have outcompeted small organizations, the transition as those large organizations themselves become dysfunctional and disintegrate is going to be wrenching. We're going to lose access to several material conveniences that we take for granted.
Maybe this transition to large groups means that it's harder to produce public goods, since producing them now always requires setting up a separate system of incentives, which is hard and can be gamed.
And by stink-eye people who did this a long time ago I'm sure were just gotten rid of because there are many types of people (though individually rare) the only way to deal with them is to not deal with them.
My personal belief is society is far too naive of extreme selfish personalities and they have infested every aspect of modern society and are actively making others more selfish.
Thank you for your half formed thought :)