I use soulseek mostly. As well as these if I can't find it on soulseek:

https://free-mp3-download.net/

https://sukidesuost.info/

When all else fails, yt-dlp. I don't torrent much music because they're mostly private trackers nowadays.

I download flacs and reencode them myself to 320 mp3. I don't have hi-fi equipment, so mp3 is just fine for me.