WaPo did not "stress that they violated company policies". There are two short sentences in the middle of the article about Amazon's reason for firing, followed by a disclaimer that Bezos owns WaPo.
Much more of the article is devoted to the fired employees belief that she was fired for her climate change activism, and not for violating Amazon policies. Including a heart breaking "I'm doing it all for you, kiddo" scene.
That wasn't the question. The fact is that you felt comfortable asserting a certain tone in the article that you admittedly didn't even read, and then the article didn't even have that tone.
You're moving the goalposts now by just saying you should blanket not accept any WaPo reporting about Amazon. Which is fine. But that wasn't your original claim.