As you know, I'm a *bit* of a tech guy. I have a 4k HDR TV and, yes, I tuned it for color, saturation, black levels, etc. As a control measure, I also watched on an iPad Pro, one of the finest and most true LED screens produced today. The episode still looked like crap. I suspect HBO GO's stream tech is a bit at fault there but, again, that's why you don't try to control for optimum output, you try to control for user experience.