You got plenty of options, varying on what level of privacy and what type of "ownership" you want.
Create a throwaway account on your phone, disable all google account stalking shit, and run youtube vanced.
If you got a home server, you can run Lidarr, and torrent shit off private trackers. >>80082441
But according to this comment, that's not good enough for you.
You can use, import lists, you can use this unoffical API.https://github.com/zmb3/spotify
My question is what the fuck is going through your head?
Think realistically about how little $10/mo is for spotify. The bandwidth, the server upkeep, The engineers to design the product, the app, the record deals to make it where they can actually stream this music to you.
You're not gonna get all that at that price point. unless simply put you're the product.
You know when boom booms are drunk on jack on a camping trip, and they go on their 'murica rant about how "Freedom isn't free."
Freedom in this case, pay for your own bandwidth, pay for your own server, and make your own algorithm for music discovery.
If you don't want to pay monetarily, then you'll just have to pay with one thing corporatists want the most, your inalienable rights