I think there's a misunderstanding about what Netflix has to do.
Netflix has to provide content that everyone enjoys. Everyone doesn't like the same thing, so it's necessary to have a bunch of content near "interest clusters" that exist within "everyone". This necessarily means that the majority of content will be disliked by any one person, because no one person likes all the genres. All that matters is that the hours of entertainment that you will enjoy is enough to justify the fee, each month. If you actually liked 90% of the shows on Netflix, the company would almost certainly be a failure, since that would mean they were only targeting your interest clusters, which is almost certainly very small compared to the whole interest space.
What makes it the Instagram? Netflix doesn’t have user-generates content. If you mean Instagram as a shorthand for crap generally, I’d choose a different comparison.
Netflix has to provide content that everyone enjoys. Everyone doesn't like the same thing, so it's necessary to have a bunch of content near "interest clusters" that exist within "everyone". This necessarily means that the majority of content will be disliked by any one person, because no one person likes all the genres. All that matters is that the hours of entertainment that you will enjoy is enough to justify the fee, each month. If you actually liked 90% of the shows on Netflix, the company would almost certainly be a failure, since that would mean they were only targeting your interest clusters, which is almost certainly very small compared to the whole interest space.