There is a thread by
@Debater Slayer elsewhere discussing the literary merits of the Qur'an.
However, there is a surprisingly predictable recurrence of claims about the excellence of the Qur'an in other respects.
It is surprising because, to the best of my knowledge, they consistently turn out to be questionable at best, despite the passion and insistence of so many.
Perhaps the best example of how bizarre those claims are is the anecdote of how the Qur'an predicts, apparently accurately by the perception of some, that Makkah is somehow "the center of Earth".
There is also the anecdote told in the Qur'an itself tells about how hard it presumably is to create a text of comparable merit. Needless to say, that is ultimately pure self-promotion with nothing substantial to show for it.
Challenge of the Quran - Wikipedia
Far as religious doctrine go, I must say that the Qur'an is if anything deplorable. Its doctrine is both derivative, self-limiting and seriously misguided, to the point that to this day it insists on the repudiation of LGBT and the defense of "proper" ways for husbands to physically hit their wives.
Then there is the sheer inability of the Qur'an to even acknowledge properly the nature and existence of either atheism or non-Abrahamic religion. Or the necessity of freedom of belief.
All in all, a pretty limited and dismaying text, raised by the sincere if misguided effort of so very many to a role that it can't ever possibly sustain.
Yet the claims that the Qur'an is of "remarkable accuracy" or admirable in other ways persist.
Do we have any true indication that such is or could conceivably be the case?