I've heard that Amazon is a horrible place to work. Execs crying at their desks, and delivery drivers and warehouse workers being forced to piss in bottles or wear diapers in order to keep their jobs. I don't imagine that coders have it that much better. Layoffs at amazon are in the news all the time. There have been reports of 150% annual turnover with the average employee leaving shortly after 6 months. Employees have said they use stack ranking and cull many of those who do stay. I expect a lot of amazon employees are very far from happy with where they are. Some probably have skills that can get them better jobs, but I'll bet it's harder for the guys doing front end web design who are ordered to implement dark patterns in an effort to trick amazon users into signing up for things they don't want.
By "happy", I mean that they're choosing to continue working where they work. They're getting a benefit from it. Otherwise, they would make a different choice.
If they continue to work at a place that makes them miserable for whatever reason (fear of loss of income, status, change, whatever), then I do have sympathy for their emotional problem. But in the end, they can choose to have a different situation.