I wouldn't call it failing!! I just happened to choose a career as a botanist that included mapping the vegetation in western Queensland, which meant spending many many hours with a binocular microscope identifying its plants. Most people don't get the chance to do that!
Hakea leucoptera has cylindrical leaves with a stiff point; those in your photo are linear but flat (2-3 mm wide). It's certainly in the 'Acacia aneura group' which includes several species, all previously called Acacia aneura, but that are now considered separate species - this is why fruits and flowers are needed to be sure which species it is.
I was at the Age of Dinosaurs Museum using their Field Guide. H. leucoptera is listed. A. aneura also included and 1 of my photos vaguely shows fruit but it’s a very bad photo. I thought the fruit and stiffness and needle like consistency of the leaves (I know not botanical terminology) made it look more like the “needlepoint” hakea. But if you are sure it’s an acacia, it’s probably A. aneura. None of the other acacias come close.
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