How can I stop Music on my laptop from malfunctioning when I add albums bought from other sources?

When I try to import albums not purchased through Apple into Music on my Mac, it consistently puts the the band, album, and song titles for each song on the album in the song title field.

Because of this, none of the tracks group as an album and they all say unknown artist. Also, none of the album artwork gets uploaded, even though it's in the folder I drag and drop into Music.

To have a workable Music Library on my Mac, for every track on every album I don't buy through Apple, I have to go into "Get Info" and manually fix the band/album/song title fields and upload the album cover. It's incredibly time consuming and frustrating. 

Is there a setting on my computer or music app that is causing this? I'm on a MacBook Pro 2017, running macOS Big Sur 11.6.5 and it doesn’t look like there are any updates for my Music app (1.1.6.37). 

(Note this is not a Bandcamp problem. I download their zips, which open fine into folders and include the artwork that looks fine and tracks that play. When I attempt to upload these to Music, things go wrong.)