At a certain point if you refuse to play the DMs story its going to be time to quit the table.
I don't see how Rag is refusing to play the story. He wants to ask a party member to leave. He doesn't want to initiate murder to make it happen.
If the party member gets hostile then Rag will fight back.
This is not an unreasonable position. I suspect the current limitation might be an early access thing, but we'll have to wait and see.
That said, I have no idea why Rag is getting flak for wanting a party member to leave and not wanting to do so by murdering them in one fashion or another.
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And yes, we all know the artefact is important. That has nothing to do with whether or not he can ask her to leave. There can be consequences to asking her to leave, but that's vastly different than murdering her.
And yes, everyone understands that murdering her will remove her from the party.