Take this article on the US Meat Animal Research Center (https://www.nytimes.com/2015/01/20/dining/animal-welfare-at-...) as a good example of an organizational misconduct investigation done right. Dr. Keen told the Times they're doing some abusive things to the animals. So the Times talked to a bunch of employees, and reviewed a bunch of documents, in order to make sure they could accurately and concretely describe specific instances of wrongdoing. This is the quality of journalism the New York Times is generally known for. It would be a much worse article - both less fair to the research center and less convincing about the accusations - if they hadn't dug in like that.
It seems like your criticism is that the article implies that Coinbase's executive management has racial bias problems, and the article doesn't establish that bias to your satisfaction. But that's always going to be a problem with news articles. Some will present evidence that is dispositive to you, some won't.
I find the reporting in this piece damning. I understand how others would view it more charitably. That's what we're meant to be discussing. Less productive: a discussion of the legitimacy of the reporting itself.
(For what it's worth, the article's lede is well-corroborated, and I agree it provides strong evidence of a serious problem with retention of black employees.)
(I wonder how many people apply this level of corroboration requirement to forward-looking statements about the benefits of bitcoin?)