Is it my phone, or is the Samsung Galaxy S21 Ultra camera super laggy?

Today, I purchased a brand new Samsung Galaxy S21 Ultra 128 GB model. I may have made a mistake by taking it to Best Buy to have a screen protector put on. The guy who did not really know how to put those screen protectors on well squeezed my phone really hard to get the bubbles to smooth out. He squeezed the area where the camera is super hard and put his fingers on all the lenses. 

When I tried to take several videos, I noticed how super super laggy the camera was. I filmed my videos in FHD 60 FPS. While the microphones worked really well along with the zoom, the FPS was not smooth at all. It was so laggy. Cars would move and would lag and be smooth again. I did everything to fix it, but there is not a fix. 

Is it possible that my new Samsung Galaxy S21 Ultra has a defective camera? Is it also possible that the guy at Best Buy may have damaged the camera by pushing super hard on it to smooth out the bubbles? 

Overall, is there anyone else who has issues with this phone's camera?