When reviewers leave negative reviews or deduct stars because of the price of a product that they went out of their way to buy, which has no bearing on the user’s experience with the product. Deducts a brain cell every time. The quality of a product is on the manufacturer, but the consumer’s willingness and conscious decision to buy the product despite their misgivings about the price is on the consumer.
Nonetheless, guilt ends where blame begins.
Oh, don't get me started on ”I’d leave 0 stars if I could!” Scathing. All that does for me is set a whiny precedent for the remainder of the review, which I no longer care to read and acknowledge.
I may be forgetting something, but those two pet peeves come to mind most readily.