I suspect that, if these shows weren't Star Trek, most people who constantly rate them high probably wouldn't even bother with them. That's the problem with arguing taste as the primary (or only) criterion of quality. Pineapple is my favorite pizza topping. But I'd rather eat a well-made pizza without it than a poorly made pizza with it.
Despite what modern discourse might lead some to believe, It is possible to have some amount of rational objectivity about things. A person is (or at least should be) perfectly capable of looking at a piece of art and say, "You know that's not my thing, but it's pretty great." Or "I love the artist and the work, but this and this and this could be better."
As per my example, The Sopranos was never my thing; I was just never into the whole mob mystique. I've seen both Godfather and Goodfellas once each and that's enough for me. But I've seen a good handful of episodes and been exposed to a lot of the show through pop culture osmosis to recognize it as (probably) the greatest TV series of all time. I feel pretty much the same about Breaking Bad. (And that's probably a crime where I live.) Transversely, I love Smallville to the point where it's one of only a few shows where I could sit down and watch any given episode at anytime if prompted. But I'm not going to sit here and pretend it was ever anything beyond a cheap knock-off Buffy clone with Superman and a would-be sex-offender.
Or, I utterly loathe "Bohemian Rhapsody." It's the proverbial fingernails to chalkboard, as far as I'm concerned. And I actively avoid having to listen to it. But if someone told me they thought it was the greatest song of all time, I wouldn't argue.
So I am perfectly capable if taking my feelings taste out of the equation.
And, believe it or not, it's true for most people as well. The most popular and touted show of the season is about chess. CHESS! And almost every word-of-social-media-mouth review of it is prefaced with phrasing a long the lines of "I don't like chess but..." Because, despite what the Star Trek fandom likes to imply, Joe Public with seek out and engage content of good quality regardless of its setting or background.
This has always been true for Star Trek. That is to say, when Star Trek is of good quality people take notice. And there is a direct historic correlation between Star Trek's [greater] success and its quality.
For example, when deconstructing them as "objectively" as possible, WOK, TVH, and ST09 are the three best films. They are also the three that have the largest pop culture foot print. That's not a coincidence. They are followed closely by FC and the first one. All the other films fall into various degrees of mediocrity.
A lot of Star Trek fans really like TUC. But, while it may or may not be a good "Star Trek film," it is not a good film. The script has huge structural issues and the conceit and the plot are entirely incongruous. More importantly, however, is Meyer just lacked the artistic edge he had during WOK. Khan was his second film and it's clear he really pushed himself. In fact, there are a lot of shot sequences so meticulously thought out that I actually think he probably spent as much time storyboarding them as he spent writing his entire treatment. He put serious thought into mise en scene and visual subtext. Shot selection and framing. Even if people aren't actively aware of that stuff, they do notice it subconsciously. Because it makes for a better cinematic experience.
But with TUC, most of that directorial drive was lost. He had become complacent, which was compounded by the fact that he was constructing an allegory that, by the time the film was released, had already lost its luster. So what was left was a weak film.
A weak film with a lot of Star Trekkieness. And that's the thing, fans love it because of its sentimentality and its very specific appeals to emotion. But those appeals are meaningless to most people. All they see is a poorly constructed film. So it fell right off the zeitgeist cliff. (Save for a few self-aggrandizing memes on George Takei's Facebook.)
nuTrek is exactly the same.
Because despite whatever "well if you read them a specific way" confirmation biased numbers might suggest, it is not greatly successful. If it were, its presence throughout high-profile social media and the like would be much greater than it is. It would be the water-cooler Twitter-talk show each and every week instead of Mando or Gambit or Crown. But it isn't. Most Skiffy-General (Let alone TV-General) YouTube channels or TV programs only devote minimal (if any at all) time to it. The overwhelmingly vast majority of people aren't even aware of its existence. And I guarantee that if it were actually as good as the evangelists claim, people would be.
But what it does have is a lot of Star Trekkieness. The great irony of the "it's not Star Trek" bullhorns is that the only thing it has going for it is that it IS Star Trek. It drowns itself in self-referential feel goodness. Without going into spoiler territory, 'Unification III' is the perfect example of this. Remove all the "remember when" moments, and all that's left is a very bare bones plot where the set-up does not align with the DXM resolution with people shouting empty platitudes at each other in between. But every other scene pulls at the Trekkie heart strings so therefore it must be good television.
That's not how it works.
And no amount of hand-wavy fallacies will change that.