One click to cancel would actually be too easy. I once had subscribed to encylcopedia brittanica. They also sent email messages. I replied to one and said “please ubsubscribe me”.

They cancelled my brittanica and refunded me! I wanted the emails to stop. Now to sign up I’d need to enter my payment info again; I just stayed unsubscribed.

I will sometimes check how cancellation works by looking at the cancel area. Would not expect a single click to terminate my account.

Easy cancelling is a great idea. “Click” to cancel sounds abrupt.