I agree with your sentiment, but it wont stop the US from falling behind. The damage has been done, the US is not trustworthy anymore, and this will not change just because Trump becomes a lame duck.
We, the other countries in this world, cannot put our trust in another country that might change allegiance every few years. Trump is not a cause, he is a symptom of a deeply rotten, racist and bigoted system that we (we as in the international community) cannot accept as a risk. And we do not expect that you actually fix anything if Trump is gone - the issue with your country is that even when you stated that state and religion are to be separated, you instead installed a civic religion which is just as bad as any other religion on earth, and just as resistant to change as any other fundamentalist cult. The US are a fundamentalist terrorstate, and the current expression of this state might change in the blink of an eye.
We won't engage with that crap if we all can help it.
Edit: i have hit some USians deep in the balls. Fine by me. It is to be expected. American Exceptionalism does not cope well with the Reality that they are the bad guys, and they have been for a long time. Putting up a mirror to their fucked up Nazi-like internal organization based on an racist ideology that they kept conserved after slavery was outlawed is an important thing.