Hey, I totally understand. Old work is hard to understand because of outdated language. As well, someone might give a long lecture on how they interpret a text. But as long as you back up your interpretation with lines from the book, your interpretation can be very very different. As a writer I sometimes see people go really deep into my work. This honestly makes me so happy to see someone interpret things at such a deep level. But not all details I insert are intentional. Not every flower is a symbol. Consequently some people interpret everything as a deeper symbol and that can be overwhelming and is usually untrue.
Therefore, readers miss key information and symbols authors put in their work but readers interpret symbols the writers did not intentionally put in. This can be fun but becomes a bit too much if the reader interprets every line and every word as something greater.
Nevernight by Jay Kristoff. Let's just say the first scene is a very NSFW scene with the MC who's a 15 year old. Just made me feel real gross inside and yet people love this book.