Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness.
Crocs is all about a brand name nothing else. I always had a bad experience using it they easily break within a month or two and no customer service is provided for any complaints . I would suggest one should never buy a crocs product.