Searching for a show or movie

What is your model Apple TV Identify your Apple TV model - Apple Support

or other streaming device with the Apple TV app? Apple TV app - Devices - Apple

If you are referring to the web interface for Apple TV+, then there is no search function there. All that is presented there, is all that is available on the web. Note that the rows with tiles are each scrollable horizontally, to reveal more content for each category.

Shows and movies that are not part of Apple TV+, e.g. iTunes Store movies and TV shows, or licensed Apple TV app Channels, are available in the Apple TV app on devices, but not through the website tv.apple.com.

If you wish to cancel your subscription, then you can do so as described here: How to cancel a subscription from Apple - Apple Support

I’m sorry it hasn’t been a positive experience for you. I know it can be frustrating when you have trouble finding what you’re searching for. I’ll try to assist you some, but without knowing which device you’re using the App on, I will keep my suggestions general. The “search” tab, or magnifying glass, will give you the best results if you specifically look for a film or show title, rather than a genera or subject. If you are using the Apple TV device, you can simply ask Siri to assist you with locating the specific title or kind of program you are interested in. The Apple TV+ tab is a landing page that shows you all available titles specific to Apple’s streaming service. Think of it as a streaming service within the Apple TV app. If you would like to share what device you’re using the Apple TV app on, and an example of what you would like to find, I would be happy to assist further. To see and manage any active subscriptions (again depending on your device) Try going to Settings, then tap your name, and then Subscriptions. Again this process will vary per device but this is a general direction. Best of luck!