I hate the modern dark-pattern shop UIs, which tries to make it as difficult as possible to enumerate what is actually available. One example is when queries reply with 'what is most like' what you asked for, instead of honestly answering "no, even though movie X exists, we dont currently have it in our offering".
Even though amazon prime is the poorest streaming option, I appreciate that they make it possible to exhaustively page through their entire offering, which I have done on a few occasions ("possible", because it is the usual user-intelligence-hostile ajax-javascript cursorless experience, where your browser is staggering in gigabytes as you approach the 3000-movie mark)