I’ll go with the low-hanging fruit: Mein Kampf. I’ve read it, cover to cover. As a piece of propaganda, it’s good. As an example of good writing? Absolutely not (though I will admit I have only read it in translation). Oh, and the whole fascist, racist, and generally shitty worldview of the author that he infuses into the text. And the fact that the author is literally Hitler. You 5-star that book? You’re a Nazi. Period. And as a Jewish person, I don’t look too kindly on them.
I have a different criticism of the book. I found very little of it was actually profoundly insightful to where you would be able to use it. I think one of the most profound things I remember from the book is talking about how much everybody loves to hear their name, but I feel like most people intuit stuff like that, they just don’t follow the advice in the book, much less remembering people’s names. Just as insightful would be to say “people will like you more if you remember their name” well yeah, no shit, that doesn’t help me remember their name