Isn't OneDrive/Sharepiont the exact OPPOSITE of a shared drive?

Background:

• At work we use MS Office, because who doesn't. We used to have a central file server with lots of well sorted directories.
• Then Corporate decided to ditch that, everything must move into OneDrive so there's always a Data Owner.
• The local boss had to move everything from the network share into his own OneDrive, and then share, with each of us, the folders that were relevant to each of us.
• This sounds like distributed storage, which is probably smart in some way.

In reality, it's shit. Everything is now a link to "corporateName.sharepoint.com" in the browser, and it's a hassle to find that in the file explorer. SOmeone just shared a folder with me. I see it in my browser. How do I get it from the browser into a normal folder view? Should I forget about on-disk storage; is everything today just a browser bookmark?

Worse, I have no idea what's where. Some people share some stuff and somehow it ends up in my OneDrive, but what's the context of it?

This seems so wrong to me. Am I just not "getting" it??