5 star and 1 star reviews are usually garbage - either fluffed fake reviews, or reviews outraged about something unrelated with the quality of the product itself.
There's a lot of gaming on those low star ratings by competitors. The trustability of reviews on Amazon has sunk so low over the years that for many products, reading many (tens or several tens of) reviews across star ratings is what may help have some idea about the product's quality and the seller.
The problem with this is the expectation of a 5 star review for adequate performance. A lot of reviewers view 3 stars as "I didn't like it, but at least customer service didn't screw me and it didn't burn my house." I'm aware that this is terrible because it leaves no room for superior delivery, but it's just the way of things.