You do like to talk a ton of nonsense, house of the dragon for example i have not watched it yet is classed as pretty good overall and it have far less total viewers than Rings of Power so you can quantify any show as being good when it has more viewers than another good tv show especially in the same general genre, RoP is pulling the boys level of viewer numbers currently so the show is considered good considering the numbers compared to other tv shows.
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Not an opinion when other good tv shows pull less numbers than rings of power, the data does not lie, its as simple as that, cant claim something is bad just because your butt is hurt over it not feeling tolkien enough or changes in the story, tolkien himself made many mistakes in his writing and story that didnt make any sense and he admitted he made lots of mistakes and wanted to change things.
For the show to be factually bad it would have to actually pull less viewers than many other tv shows and not be rated in the top 5.
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Is 40 mill in 11 days not a good number of viewers when the boys got 45 mill in a lot longer time, house of the dragon 29 million in 5 days, shogun is rated very highly and is at 10 million, not everyone likes certain genres of tv/movies, has no bearing on it at all on percentage who watch it on a platform, what matters is actual numbers.