I watched Trek Nation and didn't get the best vibe from the guy. Nothing terrible...but it does seem as though he is trying to now make money off of what his father has built. Which is not unique. People do that. Also keep in mind that he WAS a child/teen while Gene was working on Star Trek. He could not have possibly understood at that time, the magnitude. Also if a parent isn't around much and everyone is constantly talking about their work, of course you might grow to resent it.
I think people have a bigger problem with the fact that he is attempting to make money off of the franchise AFTER the fact.