What’s the problem here? The negative reviews are found on this delivery service app. They would therefore help other customers know that this restaurant is less desirable to order delivery from.
That’s what both parties want.
It seems to me that this is working “as intended” and no intervention from the state is needed.
I can't envision a way you can be making this argument in good faith while actively discarding that the review is next to the restaurant's name and not the delivery service's delivery of that restaurant's food.
For people who can’t understand it, think about Amazon and the various “1 star; late” “reviews”. To think that the same won’t happen with food is wishful thinking.
That’s what both parties want.
It seems to me that this is working “as intended” and no intervention from the state is needed.