The ignorance of international best practices is just imperial disease, a special case of not invented here. I honestly struggle to think of a technology or industry the US has lost leadership in and then recovered but it’s not like Germany is doing well in electrical vehicles. Sometimes your time is past, like the US and semiconductors.
The political and administrative sclerosis is unlikely to get better fast without the kind of pressing need that results in a new constitutional settlement. It could get better slowly I suppose. The inward looking self regard will get better when the US sees itself as an excellent country rather than assuming they’re the best at everything.