I have the same issue! I'm on a Samsung QLED 8K Q900RB Model - my TV supports HDMI 2.1 on Port 4. And its extremely saturated and dark as you mentioned. NOTE*** THIS IS ONLY ON HIGH FRAME RATE MODE - Other modes look really good, but I want to play at 120Fps! - I don't own Black Ops Cold War to test 120fps on that game, but I'm extremely bummed at this limitation (at the moment hopefully) on Dirt 5 on QLED! PLEASE FIX IT. Whether its on Samsung or Codemaster side...