I think they don't fully understand her powers or why her mind broke, they never asked and she never explained, she dosnt feel the need to explain either.
Let me put it this way:
Your brother suddenly got a girlfriend but SHE’S SUPER WEIRD & OBSESSED at how strong you are. THEN TRIED KILLING YOU TO THE POINT OF HOW FAR you can both take it.
You’ll first feel the rage = pain, and wouldn’t bother asking what’s her powers or story while in the dungeon. To you, it’s a crazy girl who just rampages without caring at what happens to others (atm).
capital letters for emphasis ヾ(☆▽☆)
Its kinda wierd how they got mad at her for trying to kill them while she died hundred--thousands of times for them. Just because she can't die, does'nt mean its okay.