I have observed through observation, that Amazon seems to be less than straightforward about their rating system. Recently I bought some melatonin from Amazon. The advert shows four stars so I bought it. Later, Mike was telling me about the bad reviews. I went and looked, and although the cover page had 4 stars, almost none of the people writing reviews had anything good to say. How did Amazon come up with 4 stars? I always assumed it was an average.
The other day, I was looking at air fryers. Pretty much all on Amazon have 4 or 4 and a half stars, but read the ratings written by users, there’s a whole different story.
So ya gotta read the reviews, don’t trust the Amazon sales page.