That's the feel I get from reading Brad Stone's "Amazon Unbound" .There were multiple instances where Bezos appear devoid of kindness towards employees.
E.g
'...In 2009, Onetto’s human resources deputy, David Niekerk, wrote a paper titled “Respect for People,” and presented it at an S-team meeting. The paper drew from Toyota’s proven Lean ideology and argued for “treating people fairly,” building “mutual trust between managers and associates,” and empowering leaders to inspire employees rather than act as disciplinarians.
Bezos hated it. He not only railed against it in the meeting but called Niekerk the following morning to continue the browbeating. Amazon should never imply that it didn’t have respect for people embedded in the very fabric of how it operated, he said...'
"...Among the final straws for Onetto was a September 2011 story in the Morning Call newspaper in Allentown, Pennsylvania. The paper reported that the company’s warehouse in the Lehigh Valley had gotten so swelteringly hot that summer that workers were passing out and being transported to nearby hospitals by ambulances that Amazon had waiting outside. An ER doctor even called federal regulators to report an unsafe work environment..."
"...Before the incident, Onetto had presented a white paper to the S-team that included a few paragraphs proposing to install rooftop air-conditioning units in Amazon’s facilities. But according to Niekerk, Bezos bluntly dismissed the request, citing the cost. After the Morning Call article drew widespread condemnation, Bezos approved the $52 million expense, establishing a pattern of making changes only after he read criticism in the media. But he also criticized Onetto for not anticipating the crisis.
Fuming, Onetto prepared to remind Bezos of his original proposal. Colleagues begged him to let it go, but he couldn’t. As they anticipated, the meeting did not go well. Bezos said that as a matter of fact, he did remember the paper and that it was so poorly written and ambiguous that no one had understood what course of action Onetto was recommending. As other S-team members cringed, Bezos declared that the entire incident was evidence of what happens when Amazon puts people in top jobs who can’t articulate their ideas clearly and support them with data..."
"...Bezos didn’t want another empathetic business philosopher to replace Onetto as the head of Amazon’s operations; he sought an uncompromising operator..."