It looks like it needs repair. Be sure to check your warranty as many are still covered.
I just bought a new Samsung S34E790C monitor and at first it was flickering only on the left side, horizontal lines were moving verticaly like in this video: https://youtu.be/PTulizYabhE
Then i left it for a couple of hours, came back and the left side of the screen was even worse. Then after five minutes the whole screen shut down and it was flickering a little in the bottom left corner and then after about five minutes it just died.