"I honestly judge our banking supplier (Barclays) SO harshly because their online smartcard-based super-duper sign-in to authorise payments for a multi-million-pound business has a minimum spec of "IE 10, or Firefox ESR"... and it literally doesn't work on Chrome at all."
Funny - it works fine for me, using Chrome on Windows 10. Maybe you're holding it wrong?
Actually the sign-in is the only good thing about my Barclays business account - features like tabbing between form fields working properly, the fact that the time-limited single-use passcode is not hidden as you type it in, and (shock horror) a single sign-in that gives me access both to the business account and to the personal account of a relative for whom I hold LPA, all indicate that somebody actually thought about usability for once. Shame the rest of their service is so dire.