9 times out of 10, when I have problems with a public charger, it's with some stupid app. I avoid chargers that are app only, and target those where I can just tap my debit card to pay (an actual card, not more smartphone tomfoolery). See also: parking apps.
It takes all of my willpower not to go full Ted Kaczynski some days.
This is one big advantage of having a Tesla and using their Supercharger network. I tried using 3rd party chargers a few times. The spotty reliability, annoying apps, & frustrating payment flows made me avoid them. With Tesla's network you just plug the car in. There's really no excuse for other vehicles & chargers being worse. ISO 15118 defines a plug & charge standard, which Tesla implements. Electrify America supports it as well, but vehicles often lack support for it, or require the vehicle owner to activate the feature.[1]
1. https://www.electrifyamerica.com/plug-and-charge/