In the comics Thanos is nowhere near the final boss of anything, but if they want to build up an event on that scale ever again, they'd have to spend another decade doing it. There are the likes of Doom, Galactus, Kang, the Skrulls, etc in the comics. Normies don't understand how all of the stuff the MCU spent fucking up adapting took decades to build up in the comics, not ten years. Movies aren't comic books, I get that.
People may hate the M-She-U now but they're gonna be hyping themselves up (unreasonably) when the next Avengers movie comes out. They always do.
the MCU has pretty much it's own continuity (there's probably a multiverse designation for the nerds, but in the end it doesn't really matter), that's why it worked. normies didn't need to know who those characters were, and they each got their own stories and arcs etc.
as for avengers, a crossover only works if it brings all the individual heroes together people actually give a shit about. someone might think tony stark is a twat, but it has cap in it so he's gonna watch it. phase 4 so far has absolute no one going soyface over it's current lineup, no one is gonna go see a movie about not!captain america, black wunderkind not!ironman, female thor, she hulk, the eternals, or whatever the fuck current black panther is supposed to be.
worse, I think they didn't even set up an overarching villain at this point, at least I didn't hear about it or people speculating. the former 10 years of MCU which ended with endgame go all the way back to the very first movies, where endgame wasn't even a glimmer in feige's brain.
MCU can do a higher saturatation because the stories are modular, and while there are the big "collaborative" events you don't need to watch the Thor movies to follow the Captain America movies, or get what's going on with Avengers. But even then, since Capeshit is the new Wrestling move, audiences are tiring. Its a completely decentralized narrative where you generally only have to care about the part you like (or the events are so major you can't help but hear about them) even as they encourage you engage in ancillary media.
This doesn't work with Star Wars. Star Wars is an extremely centralized strong-character & event driven narrative (a space opera) with more thought put into the world building in places than it deserves, which gives the option of side stories. You can write a shitty spiderman story line or have a She-Hulk story line where Skrulls invade L.A. and it doesn't really affect any of the other stories. You write a shitty central narrative story, and you have now poisoned the well and killed all the side stories.
Disney didn't get this.
it would work fine with star wars, if the people in charge and especially the "fans" would fucking stop wanking themselves raw over MUH SKYWALKERS and MUH VADER. "everybody knows or is a skywalker" was always retarded when it comes to star wars, at some point their stories are over and done and people need to move the fuck on - which would also be easy enough to do if the whole "passing the torch" is done properly, which they completely blew. there was plenty of room to set up their own MCU leading all the way to the central movies (it's a whole fucking galaxy far far away after all), which they
also blew, which is even more baffling considering they had the perfect layout how to do it in the MCU.
this is among the main reason why KK utterly sucks at her job, besides greenlighting shit movies and meddling them into trash. literally all she had to do was do the MCU with a star wars veneer, and people would've eaten it the fuck up. do a side movie or two with new characters setting up the new era, maybe even go all out with books, series, whatever, but THEN save the good shit for the big next episode where suddenly luke and the bunch shows up, self-contained enough so people can jump in there, while giving a nod to the people who watched all the stuff so far. it's not rocket science. just imagine andor happening BEFORE TFA.
As for what kills TFA for me? It'd probably be when they just have Rey perfectly do a mind trick without any training whatsoever because Episode 4 did that. It was so bad that even in the theater I went "what the actual fuck is that". That and the ADHD pacing were stuff even back in 2014 I noticed.
Though in retrospect it had to also be how choppy the first act was to save Oscar Isaac from becoming this gen's Sean Bean and Finn whooping as he slaughters his friends. That realization came about after around Ragu One and TLJ. TFA is a film that rapidly gets worse each time you think back to it. It's like a hoopty car about to die that is given fresh cosmetic work.
the worst most of the ADHD pacing is that it's so manic the actual "quiet" parts feel boring and tedious. usually the quiet parts are there to give the story and viewers some breathing room, but when jarjar does it it's more like someone shut down the music at a party.
fuck, if you do it at least go full transforms and bombard the viewer with 2+ hours of junkyards having sex, at least after half the movie you're so desensitized you can just enjoy the explosions and colors like a noise marine. that's why bay will always be a better spectacle director (I mean just look at pearl harbor, as ridiculous at it is, but on a technical and workmanship level it works great).
granted I might notice it more since I tend to watch stuff twice or even three times, and TFA is one of the few movies I couldn't even finish a second time. I think I fell asleep, then turned it off with the feeling I'm not really missing anything and rather do something else.