They’re clearly using shaming tactics. By calling it a “tantrum” they try to make those mods look childish. In reality the mods demanded something to make their jobs easier, the company refused, so they parted ways.
I did something similar except I wrote a C# program and used AvaloniaUI to build a cross-platform GUI. It was a project to learn C#. I have to make some updates to that now that I think about it…
I just have my music collection in Playlist and use Audacious to play them. All the music in the Playlist are saved in relative format so I can just copy the folders and keep the same Playlists