"Amazon Prime Books" works that bad on purpose?

Everytime i try to navigate in the Amazon Prime books section i feel like im constantly going circles. Amazon/Kindle app shows me "kindle unlimited" options even when i filter them, the "best of prime reading" shows me the exact same book over and over again after a few scrolls, etc.

It is me that im doing something wrong or is this a thing to frustrate the user and make us eventually suscribe to kindle unlimited?