https://elpais.com/mexico/2022-12-12/quien-es-mr-w-el-intermediario-que-alquila-mas-de-350-departamentos-a-traves-de-airbnb-en-mexico.html

It basically explains how almost every department in Mexico City working with AirBnb belongs to one person, creating a hellscape for any person trying to really live in there (if u want to become even more depressed; https://politica.expansion.mx/cdmx/2022/11/04/mr-w-airbnb-cdmx-incrementa-1600-renta-departamento-condesa).

We need to try staying at local guest houses/hostals maybe even hotel's, to not make things worse.

And I really love the concept of Gasthaus, I envy u Germans !