This is a lousy excuse and doesn't stand up to scrutiny. I too had a bad manager at Amazon. So did my roommate. So did my friends in the company. So did his friends.
In fact, I was a returning intern who went back full-time with dozens of other employees, and here we are 3 years in... and practically no one remains. I can count the number of people who have stuck around on a single hand.
Look into Amazon's employee attrition rate. Eye-opening. Hell, if you can, go to one of the company all-hands, where at some point they encourage new employees to stand up (hired in the last quarter)... that's not company growth, that's replenishment.
Amazon has consistently one of the worst retention rates, if not the very worst out of all the tech "majors". The problematic management is incredibly pervasive, and I'd argue that the islands of sound management are the exception, not the rule.
Be very, very, very wary of working for Amazon.