There's definitely been some rot in AWS, which has been holding off the collapse in most other areas. Honestly it seems the more top down leadership, no matter who, gets their hands involved in thr sausage making process, thats when things start to go awry.
Engineering companies success because of their engineering culture. Amazon has some of the besr in class. Keep the accountability that many other top tier companies lack, but otherwise imo get out of the way and let the ICs do their job.