Subpar effort in porting? They've been excellent for something closing in on a decade now. And VS Code is practically a mainstay with mac developers now.
Off the top of my head:
Drag a file thumbnail from Finder onto the program icon to open the file? Nope.
Click on the name of the file in the title bar to rename or move it? Nope.
I understand that MS wants to make the interface familiar for people who use Windows, but it really is a PITA, and I wouldn't use it if I didn't have to.
Maybe it wasn’t always that way but it works fine in the current versions of Office. I’ll give you that clicking on the title bar does not let you rename or move the file though right-clicking does show the path to the file and let you open the folder in finder where I guess you could do those things.
Four years ago, Mac Office was more sluggish and lacked a lot of features. Now, the performance is fine for such a full featured app and many of the missing features have been implemented.
You can argue that you don’t like Office in general but the Mac port is no longer embarrassing.
Ignoring the missing functionality (power-anything), even the one ported is buggy. It manages to crash with the same ODBC drivers, that work fine with Windows version (namely psqlODBC).
https://winworldpc.com/product/microsoft-word/5x-mac
I should probably give that up. It was almost 30 years ago.