So I read Harry Potter (as an adult). The first book, it was ok. Then it went down hill. Harry Potter was or simply became a marketed franchise: Star Trek, Star Wars, Marvel, ….
What's even to teach in Harry Potter? Yes, reading it en masse is a YA shared experience but that's it. I've never heard a Harry Potter quote. OTOH, I noticed that Careless People alluded to and quoted Gatsby.
Relatable is overrated. Books should be challenging but not too challenging. I remember reading Animal Farm at the perfect age but 1984 a year too soon. I tried reading Catch-22 in 7th grade but didn't get anything. Later, I read it 24 hours straight my first week in college, cackling the whole way through.
I remember the assigned 'relatable' books if slightly. You will relate to this. That is the assignment. I remember them as characters being kind of my age, maybe even in my school. This is the reason I didn't like Catcher In The Rye. OTOH, Winston Smith was definitely not my age, definitely not in my school and unquestionably not me.
Relatable books strike me as engineered epistemic closure. I want to know what the author thinks, not what the author thinks I think.