Not Germany, but one that in many other ways is very efficient and forward thinking. I think the banking issues are more historical and due to having a small population with generally conservative attitudes towards money and financial institutions. But my point is that N26's offering is just not going to cut it across the whole EU(+UK), and any risk introduced by Brexit (or anything else that might happen) probably wasn't worth it for them, but claiming that they were pushed out by it is pushing it a bit.
As a side, in sites such as this (HN), especially when comparing things to the US there is defintitely a tendancy to make sweeping statements such as 'in the EU $thing is [blah]...' but actually there are huge differences across the continent, which I think is actually the news story here.