What you hate or like is your personal prerogative. But when you are addressing a public audience, who have faith in you and your brand and trust you, you are morally obliged to be factually correct and not let personal opinions distort the facts. If you read that article, Tesla claims that they forged a scene as if the car just stopped randomly which is highly unlikely when there is enough charge (I am with Elon Musk on this one).
(You doesn't literally mean you, but BBC in this case)
Clarkson is not a news reporter. He's an entertainer. He is expected to be controversial and opinionated, and - depending on your viewpoint - quite delusional.
If he started being objective and serious, the show would be cancelled. As it in fact was before he pitched the new, less serious, format and convinced the BBC to relaunch the show.
(You doesn't literally mean you, but BBC in this case)