While I agree with anyone saying that Musk himself is "detached from reality", and also that the Superheavy/Starship timelines are unrealistically optimistic, given how bad basically everyone else in this sector is I have no specific reason to expect that Superheavy/Starship* will be what delays anything.

Not that this actually helps with any thesis of "Yee Haw, look at Us! We're America! We're number one!"

* And now I'm worrying the initials might have been deliberate on his part; hadn't even considered that before seeing your comment…