Good UI. Bad UX.
Many readers asked for bad UX examples and why they fail. Here are two related cases I run into often.
Context: I use a separate card for subscriptions with a small balance. When a useful subscription fails due to insufficient funds, I top up and try to pay again.
Case #1
I open this payment screen:

The same card can appear multiple times. The first method is disabled, so I cannot retry it directly. I have to add the same card again to pay successfully.
In short: there is no clear "pay now" retry path for the failed method, so the UI pushes users toward duplicate methods.
Case #2
Another payment interface has the opposite issue:

Here I can use an existing method, but adding a new one is hard to find. The action seems hidden under a menu that visually belongs to the current method.
So in the first case I could not reuse the same method, and in the second case I could not easily add a new one.