In the case of both Rivian and Musk’s companies, I’m willing to suspend judgment with the open-minded approach that the respective CEOs may simply have been unaware or insufficiently responsive to problems on the factory floor, rather than being actively malignant. AFAIK this remains plausible for Rivian, but there’s no doubt that in terms of sexual harassment, racial harassment, and the general syndrome of employee abuse and the creation of a toxic work environment, Musk is directly and personally responsible as a result of his personal ethical failures and active malignancy. Some of that was addressed here: