Reversing or Deleting Playlists added from Songshift to Apple Music on Desktop

Used Songshift to transfer playlists from Spotify to Apple Music and all playlists I've ever made are now on my Music app on desktop. I want to delete these so that I only have actual music I own on my desktop computer or reverse the entire process entirely, is this possible? Right now my music library is garbage as it has hundreds of playlists, way too many too delete manually