Said this in another thread, but it's pretty pathetic that these people resort to bastardizing Hiashi into this uncharacteristic vortex of hate to Hinata when he is no longer anything like he was in the past, during the war where he praises Hinata as much as Neji, The Last where he is worried about Hinata/Hanabi, and later confirmed again by Hinata herself on Part 3 about how much he has changed.
But anything will do to bash Hinata, including ignoring new developments.
I'm saying Neji is more talented than her or any other Hyuga for his age, including Hiashi. Also, from the way you argued, you're saying Hinata should have trained herself to become strong, something not even Sasuke, another person labelled a genius like Neji, managed.