A week?! How did anyone appreciate “Aida” before the phonograph was invented?

It takes a while for ears to become accustomed to new types of music. If you aren't familiar with a style of music, one way to become familiar is to play it repeatedly in the background for a week or two. Then, when you sit down to deliberately try to understand it, your ears will already be accustomed to it, and certain passages will stand out. Those ones are the hooks that will get you into the style.

It works for any new style of music.

I have found a lot of modern music using hooks from old pop songs to catch new listeners. I don't much like the practice.

On your original point, even discordant music can grow on you. Pino Forastiere uses a lot of dischord and I didn't like it at all at first. But I let it play out a bunch of times as there were so many other good qualities that I loved about the album. It didn't take long to start understanding what he was trying to do with the dichord and from there it made sense and I could hear it in context and enjoy it.

"The Rite of Spring" was also hated initially, until it grew on people.

It even ended up in Star Wars:

https://www.youtube.com/watch?v=PX945NlXkEA