Piracy

you can try

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

Try lossless-music.org

Program called soulseekqt. If you want a gtk app there's nicotine+

This is a privacy front-end for YT music https://beatbump.io/home if this interests you.

Here’s a site for more alternatives of other sites. https://libredirect.github.io

You can sign up for a free trial of Deezer and then use deemix-gui to search for songs and download them.

Pros: Easy interface, fast downloads, FLAC files with lyrics and metadata built in, guaranteed no broken files or scams.

Downsides: you need to create a new account everytime to keep downloading for free.

If you already have a library on another music streaming service, you can use a tool like SongShift to migrate all your songs to a playlist which Deemix can download immediately, it's super easy. Though if I recall correctly Deemix-gui's official link is down, you'll need a mirror.