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 read it while in grad school and I really liked it. Buuut that’s mostly because I was reading a lot of really dense neuroscience papers and wanted something easy to read that wasn’t a children’s story. Even then I’d only give it a 3/5.
With that said, I’m not sure I’d want to date someone who gives it a 1/5. It’s hugely overrated, but it’s not objectively terrible*. It’s a simple story that’s a low time/mental effort investment with a pleasant, uncomplicated message. There’s lots of 1000 page tomes that are much harder to read that have a weaker payoff.
*My biggest criticism of the story is that from a feminist perspective it’s very lacking. It seems to imply that only men have control of their destiny. But personally, I’m willing to give old books a pass for this failing.
It’s not even that old - it was published in 1988