Meh. I don't know. I think that's symptomatic of poor writing.
How many series have these character arcs that the collective audience just doesn't care about? Nearly all. They're filling space with stuff that doesn't move the story forward in any meaningful way. The Star Wars and Marvel universes are perfect examples of oversaturation of poor stories. There's plenty of fatigue out there as a result.
A good writer/story teller can convey a story succinctly. A more complex story can take a little longer to tell, but most of the time that's not the case.
Consider the John Wick series. We probabky all agree it was a good, entertaining action movie. Do we really need more? Is the more to learn or tell about John Wick? No. The story was pretty much done with the original movie. I'll take then 2nd and maybe even stretch to a 3rd, but that's it. Every version they make after that actually diminishes the original. An offshoot from the John Wick unvierse, The Continental, was made. It was good. Did it need to be tied to John Wick? No, it could've been done as a stand alone, but I'm fine with how they did it. It was a mini-story. Once and done.
What's more, not everything needs to be or should be a series. Top Gun didn't need another movie. What they did was good, but it wasn't necessary. Does Saving Private Ryan need a follow on? No. It was an amazing stand alone story. That's what I'm looking for...terrific stand alone shows that don't attempt to be more than what they are.
Edit: AWP's previous post basic says everything I post above more succinctly.