I don’t know how Samsung has been getting away with it for so long. They have this stellar reputation as a premium brand when they are more akin to Roku. Their software experience is among the worst in the industry. Their hardware isn’t as good as people perceive it to be either. I bought 5 of their TV’s and there aren’t 2 that display colors the same way with the exact same settings. The quality is abysmal.
What does testing some other brand have to do with anything? If I put 5 of the exact same TV’s next to each other and they all look different, they are objectively bad quality. Maybe someone else makes something better or worse, but the ones in front of me are still bad. I literally had all these screens next to each other displaying the same image. It was not possible to adjust them so they all looked the same. The lighting inside the screens wasn’t even consistent. They had different hotspots.
I saw a set of reasonably high end 'Colour True' monitors, and they all looked markedly different until they were profiled. Did you compare to a set of other companies TVs before deciding Samsung was garbage?