I agree that US remains a powerful country, but its global dominance is now over. Ukraine has fundamentally changed both geopolitical and economic situation. BRICS has become a viable alternative to the US economic system, and that undermines the very foundation of the US global dominance.
If you look at the history of US interventions, they always start by using the financial system to undermine the economy and create unrest that can be further exploited. Those days are now over because countries can trade entirely outside the US system. Not only that, but vast majority of resources, labor, and manufacturing capacity exists outside the west.
While the US is able to do its own manufacturing, it's far from being self sufficient in that regard. The difficulties the US had in re-shoring just one fab illustrate what a herculean task it would be to achieve self-sufficiency. Personally, I don't see how that's possible without massive state intervention which isn't politically palatable in US.
Contrast this with China, where state driven economy is accomplishing unbelievable feats each and every year. The progress China made with chip production eclipse what the US managed to achieve with re-shoring. China is now dominating across the whole science and technology spectrum. This gap will only continue to widen going forward.
Furthermore, the US finds itself in increasingly volatile situation in terms of internal politics. The country is deeply divided politically with two separate visions for what the US is. Each camp sees the other as a mortal enemy that's destroying the country. As material conditions continue to decline the animosity will only increase going forward, and it will eventually boil over into civil unrest.
I simply can't see how the US can hobble along for decades given the current economic reality of the country. The simple fact is that the cost of living continues to outpace salaries, and people are increasingly forced to use up their existing savings and go into debt just to make ends meet. We're already seeing people defaulting on their credit card debt, their car payments, and soon their mortgages. That will lead to another financial crisis which could easily turn into mass civil unrest and even a civil war.
My expectation is that the best case scenario for the US is that it manages to rally the G7 bloc around it, and rule over its diminished empire. However, even that is not a given with the developments we're already seeing happening in Europe. Both Germany and France are seeing huge rise in nationalism that's only going to keep growing. As US faces its own economic troubles, and the desire to contain China, it will be forced to cut support for Europe which will only feed into resentment that's brewing.
In my view, the biggest danger the US poses to the world is that it will start a nuclear holocaust when it becomes clear that its position as a hegemon is untenable.