Really, this should come as about zero surprise; in fact, I predicted it back in 2019. (That was pre-pandemic, and I got many of the specifics wrong, but the general gist of relations swirling down the toilet with China not just being all Trump’s fault has aged well.)
Many Marxists foolishly supported (or refused to oppose) tyranny in the USSR, falsely believing that the principles of socialism would inevitably produce freedom despite the immediate result of the revolution in Russia producing a new and more oppressive tyranny. Many on the Right criticize such naïveté, and rightly so.
Well, it was equally stupid to think that a totalitarian dictatorship could inevitably be steered towards becoming an open society by the magic of capitalism and markets. Capitalism has proven itself compatible with states of profound unfreedom more than once, so it should come as no surprise to see it exhibit compatibility with so-called “socialism with Chinese characteristics.”
A falling-out was going to happen regardless of Trump, so it should be no surprise that the end of the Trump era has not changed the general downward spiral of US/China relations.