I’ve used most available services, but discontinued one after another along with promises that a better user experience will be provided with reduced content and removed functionality with the slight price hike. YouTube was my first and last video service I paid for, only Spotify remains on the borderline.
You don’t want YouTube + YouTube music but you want Spotify + YouTube? I abandoned Spotify the second YouTube Premium was introduced in my country. I loved Spotify. I started using it back when it was invite only. YouTube Music is worse for sure, but it’s good enough and a lot cheaper.
I use the third party app ViMusic to access Youtube music, not perfect but it works well, looks really good and it’s free and without any ads!