One can go to any site where critiques of product can be read and find them: reviews from the disgruntled and angry. The reviewers who want you to know what they think of the product — exactly what they think, without mincing words or sparing feelings.
Sometimes that person is the sole honest analysis in the entire batch. Yet sometimes they're just having a really bad day/year/life. Whether what they say has merit or not, it's usually good for a laugh, as writers at Buzzfeed thought when they created these images of movie posters to include words of wisdom from one-star reviewers everywhere. See their full collection here.