There must be some serious bug in your packaged game. I got a VR game here that is 2GB packaged and the loading time on my low end crap pc is something like 5 seconds - and that is with a nearly broken antique HDD that still has these spinning discs and is fragmented like hell.
On my Laptop with SSD it takes like a two seconds to load. And again - this is not an empty map but a 2GB game with VR.
So i think you have some serious bugs or problems, this is not normal.