Now, since .12 dropped i am sure i'm not the only one who has been frustrated with the UI scaling on ultrawide monitors, i've tried all the old tricks in the book to no avail.. (listed under)
Borderless launch, game resolution 1920×1080, tick/untick fullscreen (which is now changed to a dropdown menu)
Override UI scaling by games in nvidia control panel
DSR change
After giving up and just playing with the native UI I grew frustrated over time and dove back into it, and I found a solution that still works. All credit for the method goes to platinums99 from whom i found the post from (original post)