is there any possibility to change the resolution or to adjust the UI? I play on a 4k screen and can barely read anything.
The recommended way is to use the scaling option of the operating system. In Windows 10, please right click on your desktop, then click Display settings, then under Scale and layout you can select a scaling percentage of 200% or more as needed.
Also please refer to this Steam forum thread https://steamcommunity.com/app/1233530/discussions/0/3186866558197431356/
if you're having problems getting the scaling to work with KotC 2.
Thank you! Best regards :-)