Battle.net failed to start, uninstalled (manually and mostly) - and now i'm stuck

This forum is for community based troubleshooting issues specific to Diablo II: Resurrected. It sounds like your issue is more specific to the Blizzard Desktop Application itself.

It does appear that you looked at an older post from the Technical forums for the Blizzard Desktop Application. Those steps will manually remove all data for the Blizzard Desktop Application and its support data and does tend to resolve most issues with the Blizzard Desktop Application but if they do not help, find a current active post describing your issue or create a new post in those forums for more direct assistance.