Afaik the bad repairability of Tesla is mostly down to the lack of parts. You cannot just order parts from Tesla, you need to be an approved shop and even then it sometimes takes months for basic things like a bumpers or fenders to be delivered.
I'm not sure how that's even legal under the magnufson-moss act. If Tesla requires you use their parts (the software portions and other many other parts are copyrighted to prevent aftermarket suppliers), then they would be required to provide them.
