Dude is a dickead that got super lucky and fell into a dream career that he wasn't even pursuing at the time. Goku is pretty much the only voice he's known for and it's kept him employed for decades, you'd think he'd realize this and be grateful to the Dragon Ball fans but instead he just acts like an egotistical asshole to them. 

I still remember that Goku Black was originally going to be played by the Ocean Goku VA, but Sean threw a fit over it and made the final project worse because he couldn't pull his head out of his own ass. Once in a lifetime chance to have both Goku VAs face off in an official arc missed over an inflated ego. At least we got Funi Vegeta vs Ocean Vegeta during the Copy Vegeta mini-Arc, Chis gets props for doing it up right on that one.