Without getting into the politics, this is what I can tell you about what I remember about school.
In elementary, I was regularly forced to read books. They expected me to read books, that would have otherwise been fun, in a certain amount of time and then to take a quiz to see how well I was paying attention.
It taught me to despise books. I hated them with a passion. There were more than a few times I wanted to pile them all up, toss some gasoline on them, and just watch them burn. Or, better yet, just throw them at whatever teacher assigned them.
Then, I moved to a poorer school where AR and books weren't as worried about as just trying to keep the kids in line. I didn't have anything better to do, so I turned to reading. Lo and behold, when allowed to read at my own pace with no pressure it was actually fun. I enjoyed it. In fact I enjoyed it so much that I started to write my own little short stories, and even took a creative writing course in High School twice. English became my best subject.
I'm not saying that it's that way for everyone, but I will say I think one of the big issues as to why so many kids don't like to read isn't the content as much as it is the pressure. Make reading fun, and children will learn to enjoy doing it.
To Kill a Mockingbird and The Catcher in the Rye aren't bad books, and in fact I think many people would enjoy reading them if it wasn't that it felt like teachers are grabbing people by the shoulders and trying to shove it down their throats.