To be fair to Amazon though, they do let you cancel the subscription online with no bullshit & you still get to keep the 90 day free trial -- presumably they hope you’ll like the service enough to decide to pay for it anyway.
(The worst example I know of this “single button press sign-up” pattern was Nassim Taleb accidentally signing up to pay for a software upgrade to his Tesla in the Tesla App that cost $1000s & having no way to undo it except shouting loudly at Tesla / Elon Musk on Twitter.)