Coupling difficult

Hello, I bought a used Kia cee’d sw 1.6 GDI (Dream-Team Edition) about 4 weeks ago. The car has an EZ of 05/2013 and has now run about 16,000 km. Unfortunately I find the clutch very difficult. During the test drive (Landstraße) I did not notice that yet, but now in the traffic jam everyday this is very annoying. Especially in the stop-and-go traffic you notice afterwards in the left leg how much power you had to use to keep the clutch pedal down. Then I switch to other cars (e.g. Volkswagen Golf, Hyundai i20 etc.), almost push the clutch pedal through the bottom sheet. Otherwise the clutch (pressure point, grinding, noises) is fine. I was already at the Kia dealer and could first check even with a new cee’d that the clutch is easier there. After having made a test drive with our cee’d, he said that the clutch would be a bit heavier, since otherwise everything would be ok, It could not guarantee that it would be better afterwards. Due to the wear, the clutch would become more difficult over time. The whole thing is all the more annoying, since the cee’d should actually become a family car, which also drives my wife. With the heavy clutch, it is understandably not particularly pleased with the car. Has someone had similar experiences? How could one remedy it? Is it possible to find a solution? ht am Ausrücklager? Many thanks and greetings!