Problems with the Zürich <-> Amsterdam line are constantly in the news[1]. I was not the only person on this train that had issues. I voiced mine at a later time directly with ÖBB unlike others that complained to the staff which were not at fault here. It is a systematic problem and the nigthjet in this state should not be offered if they can't keep it up to a minimum standard.

I don't have a problem with a 1970's train but then don't sell me a trip in a modern rail car with a 360 walkthough on the website when it isn't what I am getting. Working toilets (With toilet paper) is the only thing I would expect on a 9 hours trip, everything else I don't care about.

[1] https://www.travelnews.ch/on-the-move/24452-viel-aerger-mit-...

[2] https://www.blick.ch/schweiz/zuerich/aargauer-erlebt-nachtzu...