Brightness slider doesn't work as intended I think

Heya, bit of a weird one. Don’t think its a bug, but with the brightness slider, the image on the left is just always visible unless I bring it all the way to the bottom, in which case the image on the right is also gone.

When playing the game, it seems like overall the saturation is too muted or something. Shadows seem bright and grey. Bright areas seem dull.

I didn’t have this with the closed beta, I don’t think I had this issue with the brightness slider so don’t know if that’s responsible