The image taken by the camera is distorted.

Almost all card machines are like this. Is your colleague's SLR or card machine? In addition, it is also related to technology. Beginners tend to shake their hands when they start using the camera. Just shoot more and practice more. In addition, if you go to the photography forum to see the night scenes taken by others, you can also take beautiful photos, mainly because the camera should be stable. Besides, are you really using Samsung's camera? Samsung doesn't seem to have the i73 model.