As a kid, JS Bach's music was almost impenetrable to me, but I felt I would understand it one day. The important word is 'almost'.
I could say the same about Cecil Taylor in my teens.
In my teens I also heard the Grateful Dead. I understood the music ok, but it was coming at me from an oblique angle, like rock from another reality. I didn't really like it.
Ry's music had a lot of elements that completely turned me off. I wont list them. That would be a waste of living.
I strongly felt I needed to persevere with all of these types of music. With Ry, it took a very long time. It was a bit like when you see a pretty woman with a flaw in her appearance, and you have to persevere to see anything but the flaw.
Bach, the Dead & Ry (and others) are so dear they ingrained in me now. I wouldn't really be me without them.