There are definitely good/great teams at Amazon. However, a big problem is that the overarching corporate culture, corporate leadership, and corporate policies

There are definitely good/great teams at Amazon. However, a big problem is that the overarching corporate culture, corporate leadership, and corporate policies are toxic and corrosive to job satisfaction and healthy working environments. That means the good teams are much less numerous and also constantly under threat. It also means, as an individual, there aren't corporate level resources (HR, etc.) who are in any way invested in helping you advance your career or improve your work experience.