DS9, Voyager and Enterprise alienated discernible parts of the fanbase. Their viewer numbers dropped significantly, and they were loudly criticised by many. TNG, of course, copped plenty of (deserved) criticism early on and still never won over many original TOS fans.
I mean, sure, there are the die hard TOS is the only Star Trek people. VGR had it's many problems, and this especially came to the fore with Ronald D Moore's brief tenure and resignation. And, true, but did ENT split the fanbase in half? Many people saw it as mediocre, but it didn't receive as much hostility as DISCOVERY has.
The tone of Trek varied significantly through TOS and the Berman era. It ranged from dark and pessimistic to optimistic to absurd comedy. There were also plenty of continuity errors throughout those eras. To suggest that a mere few of a hundred-odd modern episodes have managed to meet this ill-defined standard is absurd.
But did continuity problems come to the level of wiping knocking out an entire series or more from shared inter-continuity? All the series could at least be aired on US broadcast television. All the films were PG-13 or below. Granted, the Ceti eel and the "Conspiracy" mother parasite probably did go too far, but not enough to get an R rating or an FCC fine. You never had something approach the level of torture porn. And you had much higher levels of verisimilitude and overall professionalism among the crews.
In both instances, there is a grossly simplistic and artificial divide being presented between Kurtzman-era Trek and previous eras which simply does not exist. A self-described legacy fan ought to be well aware of how divided the fanbase was long before Kurtzman came along.
The differences between TNG, DS9, VGR, and ENT are much much less than the Berman-era series combined contrasted with DISCOVERY and early PICARD. Sure, there is a world of difference between say PRODIGY and LOWER DECKS with at least the DISCOVERY of its first two seasons and early STP. But the negative reaction to NuTrek isn't evenly distributed.
Would someone that really disliked VGR or ENT be dreading a TNG reunion? Granted, NEM wasn't great but it didn't exactly have the negative ripples that STP S1 did, even though it left Data dead but not dead-with-no-signpost-to-how-he's-coming-back.
And, yes, to be fair, this is the internet. An in depth market research study into the Star Trek fanbase identifying discernable elements like a political spectrum or the Myers Briggs personality typology would help us all much further develop this. But we don't have the time and resources, so there will have to be some simplification.
But, yeah, Bill Hunt liked the first six episodes. I'm hoping I do too. Just a few hours to go...