Wait, though:
[spoiler]There clearly is some kind of investigation, but we’re not privy to that. I mean the story concentrates on her and these kids but not everything. And equally her ‘Five’ would normally assume that there is someone investigating all of this. Like I said, it’s more logical for them to assume that she is telling them things that everyone in authority already knows.
Once she’s found, they might expect the news to carry the names of the other captives but they might assume it’s to keep people protected. It’s definitely getting pretty stretched by this point. This comes back to the mass hypnotism thing.
It also feeds into your point about ‘how did she know the things she didn’t witness’. Partly I put this down to glib storytelling clichés of the genre, so I mean I just accept you get a bit more than a single perspective, but, like us as the viewers, I imagine in the midst of the storytelling they were assuming by the end they would get to find out how she knew this.
Once she finishes the story she’s immediately taken away from them which I think is part of where you see them get their ‘agency’ (I am really unsure about this word, sorry. I never studied anything around its use so I may be misunderstanding what it refers to) and start to assume the whole thing was a prank, so in a sense they are where you are.
The difference is in the finalé they are aware this is the dream she had so they change views again.
[/spoiler]
Anyway, fundamentally I don’t disagree with any of your points. It’s a TV show and it has a load of dodgy stuff, but I found I could still enjoy it a lot in spite of that. Unlike, say, Westworld, where its holes and story ideas over character meant I just lost any connection. Here there are really strong and interesting character dynamics which I think help.
I think within this story, if I just accept the big issues you have, there are still a lot of niggles, though.