HR is shady - went to HR in confidence when I was having issues with my manager and she went directly to him. He confronted me the following day.
Leadership/Management is shady - there are several terrible managers here. Thankfully I only had to endure one during my time but one was too much. When I quit, he flagged me as ineligible for rehire even though I did not have any documented (or undocumented for that matter) performance issues. I heard from the team he was just furious when I left so this felt like retaliation. It took a lot of work but eventually after finding out about the flag, I had it removed.
Work life balance is a joke - the rumors are true. While I was there, I interviewed for an internal role and the team I met with claimed they had great work life balance. When I asked what their typical office hours were they sad 8-630. In my book that's not great work life balance. That's normal Amazon hours.