Many guests don't really have a clue how reviews work. Quite a lot of them don't even know that hosts can leave them reviews too.
I don't get as stressed about 4 star reviews as I used to. If there is some feedback that highlights things I can actually do something about, then fine. Other times, the guest hasn't actually read the listing. I go out of my way to make the listings accurate and include any relevant info as well as to encourage guests to read them, so not much more I can do there.
Then there are the guests who are just going to find something to complain about, not because they had a bad stay, just because it's in their nature to do so. Like @Robin4 I've had guests mark me down on check in because my house number was not large enough. It's a pretty standard size, plus guests get very detailed directions/check in instructions, including photographs, but these guests did not bother reading those.
I just got my first 4 star review in a while. It's obvious from the way the private feedback is written that the guests thought they were writing a guide for other guests and didn't realise only I'm going to see it! I'm pretty sure of this as otherwise it doesn't make sense.
4 stars for accuracy: "Listing is very accurate. Includes detailed info about the place so it is important to read in advance."
Throughout their feedback, they mention things that were on the listing (e.g. that there are a couple of flights of stairs) and say it wasn't a problem for THEM, but keep making comments like:
"If this bothers guests, it’s important they read info in advance. In our case we knew in advance and were happy..."
The guests were happy, had read the listing and found the accommodation as described, but felt they should downrate some categories in case other guests didn't read the listing and were unhappy. What kind of logic is that?!
Oh well, no point getting stressed about it because what on earth can you do to prevent random ratings like that?