Just like any non-founding CEO, this guy is on the ropes. If anything (numbers) slips he is gone immediately. So status quo and PR juking are the game.
Jeff gets the praise for founding Amazon. This guy gets the blame if ANYTHING goes wrong. He may not even be able to control the company (see Jeff Immelt).
No, Jassy's AWS has been notorious for brutal software engineering conditions. Worse than the rest of Amazon, which is already bottom 5% of companies ratings by their internal employees.