This is throughout my Europe trip the first hostel I would not come back to.
Generator is basically the Ryanair of hostels, with the added bonus of staff that is unaware of which city we have landed in, nor that their passengers are travellers. All communication is incredibly impersonal and probably limited by the business model of HQ. Check-in is done by yourself entering the 12 long booking code on a touchscreen and resetting yourself the keycard to your room number. All questions have one answer “look it up”. And any actual service beyond this answer is deemed to require payment. Reception does not have a single map of the city and the emptiness of the desk is representative of the service. Everything about this hostel goes against what hospitality should be and as such it does not deserve any other stars than for the bed it provides (which is the bare minimum to qualify as a hostel business).
For the price of a beer you will find many more respectable hostels in Amsterdam with the feeling of actually coming home to a bed rather than coming to MacDonalds for a bed.