Slskd - https://github.com/slskd/slskd/
It uses the soulseek network (an old favourite of mine) installed though docker accessible through a browser.
If you want a desktop app, I recommend Nicotine+ for Linux or visit https://www.slsknet.org/news/node/1 for Windows.

I live in Europe. Had Spotify for about 5 years, stopped paying and using 6 months ago. I usually buy from Bandcamp, mostly non mainstream music, and download in FLAC and store it on my server. I can stream through the app on my phone when I’m out.
For the ones I can’t find on Bandcamp, or albums from major labels, I tend to find it on Qobuz in MP3. Pricing trends to be similar everywhere.
My pirating nowadays is mainly for old music or establish artists.

Edit: autocorrect