I have recently reinstalled the game and have not found a single lobby
Here is the way how I could solve this problem:
Important: the Battle.net launcher must not be started and must not be running in the background.
Press Windows+R: write: %programdata%
Now search for the Blizzard Entertainment folder and delete it.
Finally start the launcher+ game and now you should find lobbies very quickly.
I found this solution online which works for me. Hopefully we can revive the game. I love it
Important: When you start the game the next day, the newly created Blizzard Entertainment folder must be deleted again.