Maybe AR will open a new door there... I know it would be an extremely hard problem to solve - it might involve cutting-edge techniques in AR, AI, computer vision and so on - but I think there might be a billion dollar market there.
The pain certainly exists as reviews could be useful, but they're trash almost everywhere (Uber, AirBnB, Google, Amazon, Deliveroo, etc.) due to platform-owner incentives.
Seems like you'd want to pair it with a browser extension (want to avoid making that booking in the first place), and the back-end engineering is very similar to what (IMO/AFAIK) you'd need to support similar reality overlays in "true" AR.
As for the business model of this independent platform, one could still make a ton of money out of it as long as its revenue-generating incentives were disaligned from the review scores, and I really think that's not such a hard problem to solve.
For the AR-ish part... Oh, widgets! Right? Like clock, or weather, or the news thing. Constantly (modulo performance) update what you're showing on the widget based on location. Or dynamic notifications; "this is how many reviewed locations we know of at this location".
My girlfriend & I discovered large patches of mushrooms growing out of the master bedroom carpet in an otherwise very unhealthy AirBnB. I wanted to write feedback on the house, but I couldn't warn others since AirBnB's policy in such cases is to remove the listing. I spotted the listing not long after with a clean slate. I'm sure they cleaned the place, but I'm also sure they didn't tear out the floors and fix the root problem. Too bad no one will know since the ratings won't be a source of info in such cases.