nope its a problem with c2, look at the first image and compare the font size of the left menu side (Name,Plugin etc) which scales up as it should be with the event font size which is so small that you can hardly read it if you are sitting in front of 4k.
The problem with 4k resolution is that you dont just set the resolution on 4k and its done, the problem is that if you set scaleing to 100% as you would do with other resolution everything looks small.
I think Win 7 could scale up to only 150% thats why microsoft made for win 10 the option to scale up everything up to 350%.
if you want to try it out your self just keep your resolution as it is and just scale up everything and look on C2 which of your elements are really scaleing up and which dont.
heres how you scale up:
https://technet.microsoft.com/en-us/mag ... 29368.aspx