I have absolutely no problem with self-driving vehicles and I'm fully prepared to accept that it is a possibility in the near future. However I am also utterly confident that it won't be Tesla that finally cracks it, and I am sure that they will still call it "full self driving" even in a future where we have actual full self driving.
The law really needs to be laid down on this stuff, unless it can actually drive itself without a human even in the vehicle, and do so reliably, then they're not allowed to call it anything that implies that capability.
I think the problem was they probably trained the AI on Americans driving normally i.e badly, Americans have zero lane discipline, every video I've ever seen of Americans driving is like an instructional video on how not to do it.