Without even knowing you, I think I know exactly what is your problem. You're not reading with an open mind. Most people only read books where they agree with the author and agree with the books content. Get some books that you'd probably find disagreeable, and read them with the benefit of the doubt. Assume the author is right, and if you really can't do that, just remember that the writer is probably dead since long and it's just a reflection of how some people thought at the time.

I found that disagreeable viewpoints very seldom takes away any value of a book. Much worse is if it's written badly, repetitive, slow, etc.

Have you read the Bible? It's shockingly different from what people believe is written there. It is a post-apocalyptic survival guide, as well as a collection of human stories and ideas that might date back hundreds of thousands of years.

Have you read the Quran? Reading it is essential to understanding Muslims and their faith. It is first and foremost an anti-christian book, and the faith is foremost anti-christian. Just as christendom at one time was foremost anti-pagan.

There's an immense wealth in mythology from all over the world to read, which takes you on journeys much more profound than any fantasy book.

Have you read the communist manifesto? It is a short pamphlet, energetic and quite fun to read. Even an anti-communist can understand why it riled up so many people.

Have you read the books written by historical figures, instead of about historical figures. The former is much more interesting, while the latter is written by some dusty professor with an agenda.

Think about the most provocative book you can imagine and go and read it. It's just letters on paper, nothing more.

As for sci-fi and fantasy, you shouldn't read that. You only have one life, why would you waste it? You can and should read von Brauns book "Mars Project", which is the only science "fiction" book which should have been written.

For fiction, there are hundreds of classics, and the older the more interesting.

When I read a book and there's an interesting reference to another book, I always download that book as well. This takes you down paths that you never thought existed, and now I have a couple hundred books already on my reading list. If one is a dud, I just delete it.