I doubt I’ll keep Disney+ around, as it’s almost guaranteed that the Mandolorian is now going to be managed through a partisan/hyper-ideological political lense. Star Wars for me will only be the original trilogy, Rogue One and the first two seasons of the Mandalorian. Sometimes you have to realize that an IP has for all practical purposes “run out of gas”, and continued patronage just encourages the owners of the IP to continue to churn out trash. I’ve done the same with Star Trek (couldn’t make it past mid-season of Discovery, foolishly gave Picard a chance and thoroughly disappointed with the season 1 ending)
With Star Wars, I also feel that the originals, Rogue One, and the Mandalorian are the only parts I really like. But those are spaced out really far apart (1977, 1980, 1983, 2016, and 2020) -- with a lot of releases in between. I'd call that a "low hit rate" rather than "running out of gas".
I will sometimes watch things just to see what other people are interested in (especially since I run Star Wars games, say) - but I think loyalty to a brand/IP is giving corporations too much credit.
There's a lot of series I liked in the beginning ,but went off the rails after about 2-3 seasons. House MD and the Battlestar Galactica remake off the top of my head for a couple of examples.
They don't go awful right away, but you can tell they've used up the original premise and are spinning their wheels.
I hit saturation with the MCU around the time of Ant Man. (Which I liked) Everything after that I was like 'meh, whatever'.
There are series like that for me - but there are also some series that start out rough before getting into their groove. For example, Star Trek: The Next Generation started out *terrible* in my opinion, but by Season Three it had some of the best episodes in the canon.
I felt that way about the MCU, actually. I didn't like much of the first phase like Hulk and Thor. I liked the original Avengers and Guardians, but I thought it got better after Ant-Man. I hated Infinity War -- but I loved both Spider-Man films, Black Panther and Doctor Strange. I liked Ant-Man and the Wasp better than the original (though I liked the original).
I felt like especially after Guardians and Ant-Man, they got into the groove of having films be styled differently instead of just generic special-effects action movie. Doctor Strange had a cool mystic feel, and Spider-Man felt more like a teenager coming-of-age movies, etc. Civil War and especially Infinity War were more generic and boring, but at least Endgame recovered some.