Only the unqualified members of the Trump regime (and I include the two top executives) would think negotiations to be a failure after spending on it the amount of time that usually only serves, in international diplomacy, to settle the shape of the table to be used for the actual negotiations.
I've recently started to tell people that I do think there is such a thing as Trump Derangement Syndrome: The man is clearly deranged. This said, his recent musings on Truth Social in the last week or so take the cake, and someone has to tell him, in the infamous words of Joe Biden: "Will you just shut up, man!"