Personally, I just find it super hypocritical of them to advise people to not hatewatch something. Like, in general I agree with that stance. I've dropped so many shows, games, anime etc because they started sucking but I don't think they can advise that when they watched all of Star Trek Discovery and all of Star Trek Picard while having nothing nice to say about either basically.
I think what they're trying to say is that you probably shouldn't go out of your way to watch shows that you care nothing for and realize will probably just upset you. However, it's a little bit different when it's something like your sports team having a rough season. You're still going to tune in to all of the games even though watching them is largely going to be upsetting. I watched every episode of Rings of Power even though I thought it was an absolute abortion even after the first episodes. After a certain point it was enough of a trainwreck to be entertaining in that way, but if I wasn't a big fan of Lord of the Rings and Tolkien's work I probably wouldn't have stuck through to the end.
If someone has a YouTube channel that has nothing but videos of things that they hate, they're probably finding things to upset them because that's the audience that they've built for themselves. RLM isn't afraid to give their own opinions about what they don't like, but they spend a lot of time talking about films they've enjoyed or even watching b-movies to find the occasional gem in the rough. Personally, I enjoy their content better when they're talking about something they liked, but if someone wants to do a deeper analysis of why something failed, that can certainly be appealing as well. For example, I really enjoyed this particular 8-part dissection of Rings of Power.
RLM picking apart Star Trek is nothing new either. Most people only remember them from when the Star Wars Plinkett review blew up on the internet, but before making the Phantom Menace review, they had actually made similar reviews for the TNG movies. Of course, Star Trek was a lot less popular so far fewer people cared that those movies were crap as far as fans of the show were concerned. When they talk about Discovery or Picard, they actually put effort into the criticism and back up their opinions with evidence, but with Star Wars it's clear that they don't care. That perspective can be valuable to someone like me who doesn't really give a fuck about Star Wars or anything that happened with it after the original trilogy to the point where I care how bad the writers fucked something up, but might watch a show if it's good despite that.
Star Trek is their home team though and they're going to show up to watch, even if it's a rough season. When the team isn't doing well, naturally the discussion turns what isn't working, what needs to be fixed, etc. I think they're just a bit put off that it's somewhat popular to shit on something that you don't care about either because it's popular and gets clicks, in much the same way that they mocked channels that were talking about how great some show or movie was when none of the people there actually cared about it.
that sucks, at least she died in her sleep, much worse ways to go than that.
just pour one out