I obtain almost the same result with other encoders. (link : https://wetransfer.com/downloads/c2b2a2 ... 500/16c13b )
Also pay attention to the bitrate. Position between 160 and 200 Mbit/s for 2K
In your case the images are complex, there are a lot of details in them. Don't hesitate to set it to 250 mbit/s. Also try to select the Rec.1886 color space in the Video tab.