I imagine that will be the case many places elsewhere also. Certainly that is in line with my own thinking.

Opinions on China haven’t improved, the US has just fallen that far.

Weeelll maybe not entirely, while I think you are right about public opinion not having improved much towards China, and most of it is because USA definitely has fallen.
There is a matter about pragmatic politics of necessity or "real politics" as we call it here, but I don't know if that term means the same in English. But in that regard China has REALLY shot up in popularity, as the option for cooperation to keep our economies afloat while USA is hammering everybody including themselves on the economy, and is causing grat instability.

EU has made many trade deals since Trump became president, Closer ties with UK, new deals with Canada within multiple areas including defense cooperation, and trade deal with Indonesia and Singapore.
Some of these deals have been negotiated over years, but after Trump, they have suddenly become "finalized". Meaning they will be written into law.

In the exact same way talks with China are now way more open about improving trade relations, to compensate for USA being unreliable. So in practical terms, relations with China are actually improving because of Trump!

Yes, we know. You were supporting US atrocities without a shred of guilt or empathy for as along as you've existed. You only flipped because you're now on the receiving end of it this time.