I don't mind fast forwarding things personally. Either way works for me but the easiest option might just be to hit the skip button.
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I've run an annis hag in a different game and I have a similar villain in Wild Beyond the Witchlight (without giving spoilers).
Fighting an Annis Hag, or any hag, is not the issue, as they are depicted to be irredeemable monsters.
The main issue with this encounter is fighting the child without the possibility of helping the child.