yes, that's 4k. if you have a 4k monitor and don't want to run the game at 4k, you have to run the game in fullscreen and choose a lower resolution. if you want to run it in 4k, you'll need to choose the 4k scaling option in the system settings, and manually adjust your font size to make it larger

actually, the 4k scaling will make your UI larger. it looks like you may have already chosen a higher scaling option (150% or 200%), so set that down to 100% if you want it smaller. or choose what looks best