I think a lot of the criticism I've read on this forum in general comes down to fan expectations vs. creator intent...
First off, just to frame what I'm about to argue, let's just admit that Takeuchi created Sailor Moon. Yes, she was tasked by editors and execs and toymakers and so on with creating it, and they gave her prompts as to what to add into her story, but at the end of the day, it was her story and it was always credited as such. You may like the anime adaptation more and that's fine, but let's not rewrite history either and pretend that Sailor Moon was created by Ikuhara or whomever happened to adapt your favorite version of Takeuchi's story.
In this thread, people criticize Takeuchi because she won't let new a new anime, spin-off or product be made without her input and she won't let the franchise continue. But the thing is, why should this be an ongoing franchise to begin with? Sure, Takeuchi is more than happy to license her characters to appear in virtually every possible product to make money, but for decades she's been adamant in having everything she licenses be made within the scope of the story she started and finished, and I think as an author it's obvious she simply does not want that story to be continued because it's over.
If we look at the story Takeuchi wrote, warts and all, she made an effort to wrap everything together in a definitive way. The Dark Kingdom arc (where she wanted to end things originally) reveals the characters' past and the Black Moon arc their futures. You could argue the story was fully explored with just those two, and so the Infinity arc expands the action outside of the characters we know into invaders and guardians from beyond, the Dream arc goes inside these characters and expands the lore, and then Stars ties everything together with a cosmic loop. The story is deliberately left with nowhere else to go, we already know the past, present and future. Seldom do stories have such definitive endings.
Of course, Takeuchi wasn't a great storyteller and there are dozens of unexplained events and plot elements that would be interesting to see more of (or at all...), but the main story was done and I understand her desire to keep it finished. Not everything has to be a never-ending franchise. I don't see people criticizing authors for not wanting to write endless sequels for their books (just like I don't see people claiming the editors who prompted authors to write are the actual creators of a book...), so why do people have a different expectation for Takeuchi?
I think it's safe to say that's because a lot of people don't care for her story that much, they care about the 90s anime and want more of it. But we already got 200 episodes and three movies where it also thoroughly explored past, present, future. I'd rather keep it finished than dragging it out of its grave for some hackneyed spin-off or sequel. I understand we live in the age of reviving old series to pander to nostalgia, and if you want that that's fine, but I think it's not unreasonable to see things from a creator's perspective in that her story is already told.
Everybody brings up how Takeuchi disliked the 90s anime, but nobody notes that she disliked certain changes while liking others (like the Dark Kingdom finale). She's not some crazy purist who got the rights to her story and then didn't let anybody else do anything with it, she has actively participated in the creation of the live action adaptation and the musicals. Yes, we have Crystal, but we also have a bunch of different takes on her story by different authors and performers and she seems to enjoy giving others the opportunity to play around with her story, if she was so reclusive she wouldn't do this.
If there's a huge fault with her I'd say it's her Japan-centric approach to releasing Sailor Moon works. We know she has hindered the releases of the manga/anime in several overseas territories because they weren't up to her standards or simply for reasons nobody can figure out, and if things get cancelled or dragged out abroad she doesn't care at all. Things like PGSM have been Japan-exclusive for ages for no good reason. Thankfully, PNP seems to be taking international fans more into account in small ways, but we still got the short end of the stick for years.
So TL;DR: like it or not, Takeuchi had a story and she's done telling it.