Funny thing, but the Swiss are looking at banning DB trains because they are never on time and messes up Switzerland’s public transport schedule.
The Giruno EMUs of the SBB serving the Eurocity from Hamburg to Basel are having technical malfunctions causing delays & aborted trainrides for the last few weeks.
The Eurocity(Express) Zurich-Munich is the most delayed long-distance train route in Germany. Most of the German route is only single-tracked and overcrowded.