You forgot the 5th actor - Russia - which is benefiting hugely from the collapse of NATO, the loosening of oil sanctions, the huge hike in oil prices, and the way the US was persuaded to expend a ridiculous percentage of its conventional missile stockpiles on a pointless project.

Ukraine is doing its best to minimise Russian oil exports, and that's certainly having an effect.

But strategically, Russia is a huge beneficiary of this mess.

Oh, also China who benefits from US deterrence being relocated from APAC and buried into Iranian dirt

I agree with most of this, but: The collapse of NATO is not yet in evidence.

It depends where you draw the line. The extended players include:

1. Russia (as you say): I think this war of choice virtually guarantees a settlement of the Ukraine war along the current borders. At some point Europe will need to ease their energy crisis with Russian oil and gas. Well done, everybody, the system works;

2. Europe: like the GCC they are finding US security guarantees and the NATO protection racket aren't what they were sold. Pax Americana was an illusion. I've elsewhere predicted this is going to lead to arms and tech nationalism within Europe. It's actually a race between fascism taking over Europe and Europe divorcing itself from the US and I suspect fascism is currently winning; and

3. China: the biggest wineer of all this. China is still receiving Iranian oil exports. In fact, the US "punished" Iran by lifting oil sanctions, allowing Iran to sell oil to China at market rates instead of below market (because of the sanctions). Again, well done, everybody; and

4. Asia: this has exposed their weakness of imported oil, particularly Thailand, Vietnam and the Phillipines. I would not be surprised if this war of choice is the turning point that leads to a China-cenetered Asian security compact.

In one year, the US has essentially torn up the entire post-1945 rules-based international order, which it designed for its own benefit.