I used to have a command line app that could take a list of Spotify URLs, your credentials and allowed you to bulk download everything directly from Spotify. In my opinion the tools that use Youtube are worthless because they rarely work for the things I want. But I forgot the name of that tool and have been desperately looking for it every since, without success. This thread prompted me to look again and I found https://github.com/casualsnek/onthespot which does basically the same, but with a GUI. So far it works fine.