Music
I recently upgraded my MacOS and really, why is the music app so much worse than iTunes ever was? Constantly refreshes my library when I'm adding music to my iPhone (ignoring filter instructions), shortcuts don't function as seamlessly anymore, albums don't collapse open like they used to (instead opening the chosen album strictly without view of the rest of the library) and you can no longer directly move music from Mac library to particular playlists. Apple "fixed" something that wasn't broken.