Use Picard to correct missing metadata, album art, and file name / structure.

https://picard.musicbrainz.org/

I’ve had zero issues scrapping my music library since doing this.

Just make sure to review the settings in Picard to set up file naming conventions how you want it before you start.

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I use TubeSync to do the downloading and then have Jellyfin as a frontend player. Seems to work pretty good for me and was pretty quick to stand up in docker.