Core-banking outage at German fintech startup

I have a checking account with a fintech startup. While most of them have literally non existing customer support, the customer experience of mine has reached a new low: I just found out that their entire core banking system has been experiencing an outage since yesterday already. Not by email, nor by push notification of which they supply you with plentiful. But only when I logged into their app I got notified. It baffles me how such an important piece of business infrastructure is being treated as of so little importance by the organization providing it! It seems not to be their fault as they’ve built their startup on top of another banking infrastructure fintech, but should this make any difference in my customer experience? Just as I receive near instant notifications from the server providers, I would expect the same from a bank startup. Do I have exaggerated expectations, or are we just spoiled by cloud infrastructure providers, and the Amazons and alike?