how can i cancel appletv -- extremely difficult?

There is an Apple article that explains how to cancel subscriptions. Click on the following link: If you want to cancel a subscription from Apple - Apple Support

or use an internet browser to cancel as described in How to cancel Apple TV+ - Apple Support

or cancel in the Apple TV app as described in Manage subscriptions in the Apple TV app - Apple Support

Apple and Third-Party (from the AppStore) Subscriptions can be viewed from your iCloud account on your Mac and other Apple devices by going on your Apple ID image > Media & Purchases > Subscription.