I don't subscribe to a lot of services, but I find that eg. subscribing and unsubscribing from Netflix is a much nicer experience than subscribing from something that uses Apple's service.
With Netflix, I know exactly where to subscribe and where to unsubscribe, and the terms are pretty clear.
Apple on the other hand makes it surprisingly hard to show your active subscriptions. On the Mac, I think you have to open the Music app and click on a bunch of links that I keep forgetting. Kinda weird when Apple is supposedly known for their ease of use.
It's also often unclear how it works. In one app I clicked "start 14 day trial", but ended up being charged for an annual subscription immediately. At first I was surprised, but then I thought maybe it was because I had apparently started the trial already a few years ago already. The buttons I tapped did not make that clear.
And some basic things are impossible with Apple's solution: Eg. charge the Apple Music subscription to a different bank account. Nope, with Apple all your subscriptions go to a single credit card.