Agreed. This is my largest and really only gripe after switching from Plex. I moved my server over from Mint to Arch and rescanning my hundreds of shows and movies for the Metadata took over an hour. It still missed plenty of shows too. Had to manually update those and each time it took like 5 minutes per season.
The jellyfin UI has been 1000% more responsive and the CSS customization is clean, but damn is the scanning slow. Still not going to back to plex though the input delay was disgusting for me.
Ahhhhh…well I definetly find this unpopular so I’ll vote you up. Picked the right sub lol.