Sounds frustrating.
You don't want DX12 enabled - plenty of posts about that.
I'm guessing you either have a graphics issue or a file access rights issue.
I suggest starting by posting a DXDIAG report. There may be information in there that somewhat will spot.
If that doesn't get you where you need to go, you may need to completely reinstall the game. (Your multiplayer progress will be saved in the cloud.)
Thanks a lot for the reply and sorry for the late response, I've just been busy this past week. I've attached the DxDiag report. Although I have to say I haven't really done anything but the game seems to be loading faster especially when starting and loading the main menu which now take about 3 min and 10 sec respectively. Maybe it was an update or something I don't know, but it is now a lot more bearable, even though loading a map still takes several minutes.
