Nobody's defending narcissism. My objection was to reflexively associating
these problems with narcissism, and by answering only in the context of narcissism you're still equating the two. So let me even more blunt: that theory is so weak that it's almost self-refuting. Let's try to apply it to the OP and see just how badly it goes.
The first item on the list is inability to celebrate. How does that suggest narcissism? Can it not be explained at least as well by feelings that the subject of celebration is undeserved, transitory, and subject to reversal?
The second item on the list is inability to rest. How does that suggest narcissism? Can it not be explained at least as well by feelings that one is an impostor, unable to keep up without making extra effort?
And so on. Every connection you claim points to narcissism actually points even more strongly somewhere else. Narcissism causes problems, to be sure, but it's far from the only thing that can cause these problems. Claiming that these issues are all about narcissism is tantamount to claiming that conventionally-measured success itself is all about narcissism. As I said, it comes across as a big load of sour grapes.