I would not call it good relationship, US just stopped pretending, that is all. They were always a global threat. I am happy US delusions finally forced everyone to stop pretending too, because the cost of it got too large. Splendid.
Ah yes, Disney's Frozen philosophy. "Let's stop pretending having to much power is a curse."
Being a global threat but "pretending" so well to be a good faith actor that people treat you and engage with you as a good faith actor, is literally the same as just being a good faith actor.
The US was a good faith actor, especially relative to its power. Now it is not. It is not good for the world's most powerful military and economy to stop "pretending" to be a good faith actor, and it is not something you should find any joy in.