There's just too much too often. Disney either can't afford to or doesn't want to tone back on the amount of things they're shoveling out, to the point where shows (and movies) are released without actually being worth our time. With them releasing so much stuff all the time, none of it gets to feel special. But, they're all so ragged around the edges that it's a blessing that we don't have to think too long about them; however, if they cut down on the amount of content and focused on making the stuff they release better and more polished maybe we'd want to spend more time with them.
Book of Boba Fett was sloppy and slow, and needed what felt like an eleventh hour injection of Mandalorian to fill in the runtime. I didn't watch Kenobi, but it sounded like there were a huge amount of unforced errors with plotting, characters, and just basic things (even I've seen that awful moment of him attempting to sneak through Empire HQ with a child hiding under his coat and it looks bleedingly obvious). The trailers for Andor look good (more Stellan Skarsgard, please), but I'm pretty nervous that it just won't be as good as it should be, and that has everything to do with the last few outings from Star Wars and nothing to do with Andor itself. Do I trust them to make a good one this time? At this point, Season 1 of Mandalorian feels like a happy accident whose success isn't going to be repeated any time soon.
Meanwhile, the main problem with Marvel shows appears to be the CGI - it just looks bad, and apparently some effects workers and houses have begun to refuse Marvel contracts because they are a pain to work with. The stories with Marvel are hit-or-miss, often within the same series. WandaVision was incredible until the finale, Loki was alternately mind-blowing and mind-numbing, Falcon just didn't work, Hawkeye was sometimes fun...and I'll be honest: I haven't sat through Moon Knight and Ms. Marvel (and I'm going to skip She Hulk) because I'm just tired of sitting down to watch these shows. I've already fallen behind, and there's no point in catching up. To be honest, it doesn't feel like the shows matter. Strange 2 was, in theory, building off of WandaVision but Raimi (allegedly) didn't watch the entire show and it felt like you could understand the movie without seeing the show - so can we really expect any of the future movies to truly care about the shows that fed into them (like The Marvels)?
It's literally that there's just too much of it. Nothing feels special, and even if they do hit on something spectacular it doesn't get enough time in the spotlight before the next thing comes trundling down the tracks.