https://en.wikipedia.org/wiki/Deutsche_Bahn
Deutsche Bahn AG is the national railway company of Germany. Headquartered in the Bahntower in Berlin, it is a private joint-stock company (AG), with the Federal Republic of Germany being its single shareholder.
They actually brag about how the privatization in 1994 was a huge success. The history of the privatisation of the Staatsbahn is so convoluted that it's hard to tell what actually happened.
https://www.deutschlandfunk.de/erfolgreiche-weichenstellung-...
EDIT: just because privatization isn't the kind of privatization you like doesn't mean it didn't happen. especially since the people here have no idea about the actual internal structure of the institution and who the leadership answers to.
The word "private" as used here does not mean what you think it means.
("Mit der Bahnreform entstand ein Wirtschaftsunternehmen in privatrechtlicher Form. Der Bund blieb zwar alleiniger Eigentümer der neuen Bahn AG, er sollte allerdings nur noch bei strategischen Entscheidungen mitreden dürfen.")
That is the point.
Gigantic projects like nuclear reactors, stadiums, high ways, bridges, airports (hallo Berlin) trains (and big software projects and wars, too) are just different ways of funneling a significant percentage of the tax payer money funding the project into the politicians' and decision makers' circle's wallet.
The rails near Hamburg Altona are rotting, but the Bahn didn't want to foot the bill. So they came up with a horrible new station somewhere else. As a result the city chipped in to make a better one and pay of it from tax money.
I'm the last person to favour the government institutions in Germany. They're slow, lazy and full of old lazy hierarchies that must have been productive 30 years ago, but what is the point of privatizing something when the structure itself doesn't change and the privatization does nothing but siphon money out of the system and pump tax money in anyway? Half the ICE fleet is out of commission nowadays.