I think you would find that their security is better than you think. Otherwise they'd be hemorrhaging money left right and center to North Korea and the likes.
As for usability, probably a degree of incompetence, mixed with design-by-committee and legacy. Edit: It's worth pointing out that banks usually don't gain or lose customers based on their UX, so it's not something that the business optimizes much.
I don't think there is anything technically difficult about almost any of the consumer software facebook offers, except scale. The same applies here but exchange "scale" for "scale, reliability, security, and regulatory compliance".
As for usability, probably a degree of incompetence, mixed with design-by-committee and legacy. Edit: It's worth pointing out that banks usually don't gain or lose customers based on their UX, so it's not something that the business optimizes much.
I don't think there is anything technically difficult about almost any of the consumer software facebook offers, except scale. The same applies here but exchange "scale" for "scale, reliability, security, and regulatory compliance".