There's nothing wrong with being an exec. And the characterizations of the people making the show are not accurate. I interned at TNG the year Mr. Piller took over and pitched every series after that (except DS9).
Those people were busting their asses to put out a good show, every time. It's just they didn't understand that the industry was changing around them and weren't capable of modifying their approach suitably to keep up.
ENTERPRISE was promoted as a new sort of Trek for the new audience but it floundered because, by creating a prequel, you lock yourself into known conclusions meaning you have to write REALLY well to keep people interested. It also makes the show about itself, rather than about the audience which, to me, is like mixing the poison yourself before drinking. But it wasn't because they weren't TRYING. These are nice, hardworking folks. Sometimes the bear gets you, that's all.