Hi guys, I'd like to inform you that this bug is affecting me, too.
It's exactly as SuchStealth illustrated it. As soon as the game loads - just after the intro (which is fine) - you end up with something like the attached picture.
(Edit: Dunno if it's important but it's a photo taken with my phone, not a screenshot. The screenshots I took were "clear", not showing any issue at all)
I tried to verify the integrity of the game files / clear the cached user data / reinstall Squad but nothing changed.
I really don't know if this can be helpful but I noticed the following:
If you have your game in windowed or borderless, the green flickering/tearing disappears. It affects only Fullscreen.
I play in 1920 x 1080 so I always have the same resolution selected in game; however I tried to re-select it (in the main menu) and it momentarily fixed the bug (in fullscreen). No more green. Momentarily 'cos the green came back as soon as I closed and reopened Squad.
I also checked if other games had the same problem:
Squad --> YES
Rocket League --> no
Rainbow Six Siege --> no (to my surprise )
PUBG --> YES
Yup, PUBG showed precisely the same bug: green flickering, fullscreen, ...
Maybe this bug is due to something between 388.31 drivers and Unreal Engine 4?
By the way I'd really like to use the newest drivers for my other games, as said by SuchStealth so I'm not a big fan of using DDU.
Please let me know if I can help you in any way to address this bug!