High proportion of negative reviews
Um....that thing has an overall 4 star rating. What criteria are you using to define "high proportion of negative reviews"? I mean, yeah, it's got a lot of 1-star reviews, but not enough to drag the rating down significantly. Granted that's because of 100k almost-certainly-bot-generated 5-star reviews, but still most people are just going to look at the overall rating, not the individual reviews.