All operators run on DB infrastructure.

I recently experienced this with CD from Karlovy Vary to Berlin. It was snowing that day and inside of the Czech Republic I was enjoying the scenic view of the Egerland without any delays.

But as soon as we pulled into Germany, the train came to a stop - problems with the rail security infrastructure, nothing the train operator has any influence on.

We eventually arrived in Berlin with +1h delay.

> All operators run on DB infrastructure.

Rails, buildings and train stations are in separate company (DB InfraGO), owned by DB.

But DB has no monopoly on trains in Germany, any company can run trains there.