My absolute favorite bug is the one where the “cancel your Amazon Music subscription” is seemingly the only one of what must be tens of thousands of UI elements in the Amazon app that simply loads a blank white screen no matter what.
What are the odds!
Sounds like credit card sites. Most everything is pretty creaky; “redeem rewards” is broken or offline for maintenance; “pay bill” is greased lightning all the way through.
I've noticed exactly the opposite with other kinds of lenders. Refinancing and renegotiation is optimized to the hilt, but the payments system seems to have an SLA of zero 9s.
If a website won't let you cancel, call your bank to force them to block the payment. This will cost the website $20 and a ding on their credit report. Be aware the website will ban you, so you'll need to make a new account.
Which is exactly why Amazon can get away with it. I’m not going to get permabanned from what is essentially a utility in the western world in 2026 by going nuclear with a credit card chargeback.