Yep, a local pub used to give large portion sizes on in person or takeout orders. Then one day we ordered and it was like half the size as normal but of course the same price. Thought it was maybe just a fluke so we gave them a second chance. Unfortunately the portions will still the same smaller size. I proceeded to update my review to indicate the change in portion sizes with the same price. However I noticed many older reviews still indicating large portion sizes as well as even new reviews saying it. Because many new people wouldn't even have the comparison to how it used to be.

So you're getting both new reviewers (or travelers) who don't know it used to be better who still call it good, mixed with old reviews calling it good.

It's not even just a management change that causes this. This is when you almost wish Google maps would put your location history to use. It sees you visit the place frequently and thus if you stop visiting and leave a negative review it should weigh that review higher and give it more visibility. An old stale review or a review from someone who visited once I don't think should be as impactful or useful on the experience.

Overall I find discovering new places to be frustrating as reviews often seem useless. Usually I find the best method of discovering new places is still via word-of-mouth in person.