Please visit this group in FB which was created to register all the concerns from hosts and guests from all over the world. We can collectively work together to fix this situation.

https://m.facebook.com/groups/1316864141779135/

There's also e.g., HRS Group in Germany [1] - albeit much smaller with a revenue of about 200M €.

[1] https://de.wikipedia.org/wiki/HRS_Group

Booking and Expedia are the same company as mentioned in another comment here.