Unable to set game to fullscreen

@EA_Atic  I was able to press Alt-Enter and it kind of helps, but it doesn't solve the problem. When I alt-tabbed before, in borderless fullscreen, the program screen would be in the background and still running (in fullscreen), not when alt-tabbing, the exact same thing happens now, except the program covers approximately 3/4 of the screen, originating from the top left. Additionally, the clips feature still does not work when I do this.

Also successively pressing Alt-Enter sometimes puts the game in windowed mode in 1600x900 resolution. 

@EA_Atic 

No dice. Deleted my drivers and used GeForce Experience to re-download and install. Restarted my computer twice. Still the same issue. I see no difference in how the game acts when alt-tabbed.

I honestly think it's just how the devs coded fullscreen and that it's not coded correctly (I guess)

I don't think you will be able to help me here. I appreciate all the help you have given me though.