This is fud that has been doing the rounds for ages none of it has ever been substanted. It's all YouTubers with click bate stories.
You are correct, this is of course mostly rumour. The reason I'm relatively confident is that on almost every occasion I can remember, the insider sources I have listened to have proven to be prescient. It is rarely possible to be 100% accurate in the details, but the overall point is usually correct.
The only Star Trek fan you can talk on behalf of is yourself, I have been a Trek fan all my life and enjoy DIS.
I wouldn't consider myself a Star Trek "fan", just a fan of the show. Like Star Wars it is the issues surrounding it that are interesting to me. Saying that, I now have fan restorations of the original Star Wars trilogy based on the original prints. So who knows? I may end up with Kirk's phaser, or Janeway's coffee mug
...I have been a Trek fan all my life and enjoy DIS.
As I said, even though I dislike certain elements of Disco, I did enjoy it overall. So even though I understand the sentiment, I do think that some commenters are being a little harsh.
There are Trek fans out there that will tell you they hate DS9, VOY, ENT or even TNG.
Many Star Trek "fans" say that Star Trek's current iteration simply isn't Star Trek and point to The Orville instead. I've never heard any fan say that about DS9, Voyager, Enterprise and especially not Next Gen even if they dislike the show itself.
The only real gauge we have of how well Trek is doing is through CBSAA quarterly earnings reports which show the shoes are bringing in new customers.
How many? I only ask because not only is it being rebranded but they are launching other related services which will either fold into or take over the existing streaming service.
BTW, I can think of one mainstream reporter who is on the side of the entertainment industry in general, and in particular its current direction. But she does try to be fair and will report many of these "Click Bait" rumours when she is sure. Her sources are solid so she does tend to get even the details correct. On multiple occasions she has been absolutely slaughtered on Twitter and forums, then 3 to 6 months later, the trades are reporting the same things. The trades also hear these rumours but their level of proof is higher. Plus it is not in their interest to report rumour against their own vested interests.
I hope this clears up where I am coming from here. I place a different point of view based on information sources which over the past year or so have proven themselves to be pretty accurate. I wouldn't put them here otherwise.
So let's just agree to disagree and wait for events to unfold.