Hi@David,
Comments like that really stick in your craw don't they?
Personally I think what you provide is more than reasonable.
Probably given that you provide coffee, tea milk etc, also providing sugar WOULD be a good idea, but as a guest I wouldn't make an issue of it - I'd just go buy some, especially given everything else you provide.
You dealt with her complaints professionally in your response and future guests will see her as a complaining unrealistic whinger, IMO.
Try not to let it worry you too much - it's a drop in a pile of otherwise lovely reviews.
Extraordinary given that she is a host herself!
And I notice she cancelled 3 of her own guests in quick succession. So she's hardly professionalism personsified! And did you read the review she left for her Spanish host? An hysterical rant.
It's her, not you.
As a host , if she tried to book with me, I would decline her, based on her review of you and your response, ( and the Barcelona review) if that's any consolation.
More experienced hosts will by by later I'm sure to give more advice.
Just focus on your next guests and put her our of your mind. I know it's hard.
Best of luck!