The US is undermining its own (and everyone else's) economy just fine, no imaginary assistance from China necessary.

The role of the US was always to purchase cheap Chinese hardware, slap some modestly better software on top of it and the rest of the world happily would pay for that as a whole package. But with the US increasingly becoming isolationist, the rest of the world is starting to wonder why do we need the US as a middleman at all, so the US had to invent a whole new reason for the rest of the world to rely on it: AI.

Of course, the problem with this idea is that while everyone was perfectly happy with the previous arrangement, nobody else in the world gives a shit about AI. It's scary, it takes the coolest things we used to enjoy doing and turns into mush, it destroys our local culture by making us all rely on English, everything bad (like layoffs) gets blamed on AI and so on and so on. And when you combine that with the rest of the stupid foreign policy decisions, many would find joy in witnessing the US economy crumble to the ground. Pointing the blame to China instead of to your own reflection in the mirror is just an easier pill to swallow.