I've seen your post in C2 forum and I tried your project in both C2 and C3.
If I look very-very closely to the screen, I can see a few pixels on the right side flickering just a little bit. But it's so minor that I would've never noticed it if I wasn't looking for it specifically. It's definitely not "flickery to the point of unplayability"
So there must be something wrong on your side, maybe try updating video card drivers?