When I consider these UX fails I often attribute them to the faith in AB testing. It may not be, but it's common for people to complain about X in the Netflix UI and then have either employees or apologists come in and talk about how there have been 100k variants vetted through A/B testing and say the way it works now is the way most people like it. However, this approach tends to fall flat on cross-cutting and more creatively challenging UX concerns. Sometimes you need a Cambrian explosion.