The funny thing is... „Again losing customers“ they still have about half of the market in their hands. Private and business. And the world know „German Mittelstand“ will do anything, but change in masses to private corporations and big banks.
Little excurse... Germany was not nearly affected of the financial crisis a few years back because there are not only three of four big players on the market, that rule everything. The market is stable because most of the market is separated in hunderts of small or up to middele tier banks.
What are you talking about? Sparkasse (any of them) are OLD. Most of their customers today are either old people or people who don't know much about the world today. No young people in Germany open accounts with Sparkasse.
There are plenty of FREE and BETTER options to Sparkasse. DKB, Comdirect, N26. All of them provide free credit cards, app support, decent web customer service.
Sparkasse are crap. Moved from Stuttgart to Hannover? Tough luck. You will be paying for withdrawing "your own money".