I think the root problem is that no studio anywhere is large enough to put out enough high-quality content to keep the people engaged continuously. Not even Disney.
All the studios were looking over at Netflix making all the money and wanted to disintermediate the middleman, but the combination of all of them doing that turn one fairly decent (not perfect, but decent) streaming service into an array of streaming services each individually not worth the subscription. That worked for a bit but it's wearing out.
The solution of just pumping out more is the obvious one to try, but it hasn't been going well.
I'm... actually not convinced that's impossible? The bottleneck on these seems to be quality writing. Generally the actors act, the editors edit, the directors direct, the effects crew broadly succeeds at the effects, etc. But Hollywood in 2023 seems to have negative respect for writing. Take any Writing 101 course, and if you want to write for Hollywood, completely throw it out the window because they do not care in the slightest about any of that. I recognize of course that any 101 course is only the intro and the basics, but current Hollywood writing is not taking the rules, deeply understanding them, and then transcending them by virtue of the deep mastery of their craft... they're just plain writing for crap. They've got a ton of other priorities and "good writing" is so far down the list that it might as well not be on there.
You can't get the best of the best to write for 100% of every season, but a lot of streaming stuff is several cuts below what middle-of-the-line episodic television shows were managing in the 90s in really, really basic stuff. Surely there's enough competent writers to at least get a solid C on the writing front to let all the other factors carry over to "at least worthwhile", if Hollywood would just raise the priority on that quite a bit more.
Tons of high quality content is probably not on the table for anyone, but surely with all these resources we could scrape together some medium quality content more consistently?