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 haven’t read anything by her, but if anyone chose a kind of chick lit for their 5/5 book I wouldn’t bat an eye tbh. Sometimes easy reading like that is really enjoyable, relaxing, funny, and comforting, something that can be quite nice after a day at work. Sometimes a book just really resonates with you, even if it’s not the best piece of literature ever written, it just happens to appeal to you, or you can see yourself in the character, anything.
I’m not saying this is you, but a lot of people seem to automatically look down on this type of writing in an elitist way. Like it’s easy reading for idiots who can’t handle War and Peace or what have you. I’ve also noticed this attitude tends to be more directed against things women are more known to like. Again, I’m not saying this is how you are, just that I’ve noticed a pattern.