Governments can be just as bad at infrastructure investments.

That being said, I get the sense it's a German cultural problem. I used to travel to Germany quite frequently and was always surprised at the poor quality of much of the infrastructure, including private. The cell phone networks and internet speeds were all awful. As recently as 6 years ago my phone dropped to edge as soon as I left the city and within the major cities I had terrible performance. I'm not kidding when I say that I often had near dialup speeds, despite having full LTE bars. Maybe this has improved since.

As for rail, for Europe, the rail lines should probably be run as a cooperative with the rail companies paying dues.

It's not a purely cultural problem but mostly a political problem.

Germany sold out (a lot of it under the table and really fast without proper oversight) all of the good working stuff in the 90s to investors and the state kept all the bad stuff so there's no money or will to invest. All of your examples were state owned and operating nicely in the 80s. And then the CDU basically froze all progress for years under the umbrella of saving costs (instead of taxing the rich and companies and opening a lot of loopholes to transfer assets out of the country)

So all of the infrastructure in all aspects is on its last legs and somehow now you can't build stuff anymore anywhere apparently because everything takes forever in the western world especially in Germany where maddening Bureaucracy is apparently a good thing.