(1) Industry. Why did the US government aggressively pursue a “post-industrial” economy? China was essentially given the keys to the world’s industries by US leaders in politics and businesses. It’s natural for China, as an industrial leader, to have a bigger role in the world.
(2) Key technologies. Why did the US pursue a laissez-faire approach to high-value technologies, such as solar and battery-powered vehicles? “Let things happen” is an unrealistic economic policy for areas of the market that are winner-takes-all. It’s natural for China, as a leader in key technologies, to have a bigger world stage.
(3) Public education. Why has the US allowed high-quality, regional newspapers to implode? The public is being whipped up to ever greater frenzies by increasingly poor media, which has led to increasingly low-quality leaders, for example, in the Republican Party. It’s natural for countries with more well-informed governments, such as China, to have a larger role in the world.
It would be wonderful for the US to stop threatening China. China is not threatening the US.
And what of aggressive Chinese actions around the Spratly Islands, which are carried out in violation of a very clear 2016 UNCLOS ruling? What has the US done recently to violate Chinese territorial waters in any similar sort of way?
I actually think that actions by the West over the past ~200 years really set the stage for things that are happening today, but I don't think it's fair to paint China as an innocent actor with pure intentions; they're not.