Apple Watch Series 7 GPS reading accuracy

I just switched from an Apple Watch Series 4 to a Series 7. I use my Apple Watch mostly for running. The main reason for switching was that the series 7 is supposed to have a better GPS accuracy, and also the always active display, witch is useful when running and checking the Watch. Today I did my first run, I use NRC (Nike Run Club) app, and I got HORRIBLE GPS readings. Not accurate at all. Let me share two pics, a previous run using my Series 4, and todays run using the Series 7. Just compare how horrible the Series 7 was. Is there something to be done? Is there a way to calibrate. The park where I run is an open space, and today was mostly sunny with scattered clouds.