Thanks. Now it is pretty clear.
Especially from this picture:
Somebody had no choice but to open it, judging from those five squares on the screen
It is just that the screen is stuck to the bezel and does not want to separate.
Do you push the screen itself near the bezel with your fingers while pulling the bezel to begin the separation? Otherwise I don't know what will give first - the sticky tape or the glass of the screen.
Maybe some flat surface is needed to increase the area - to put it on the screen and push it so that all the pressure is not applied to a small spot.
Where is it better to begin the separation, at a corner? More pressure on a smaller surface of the sticky tape. Once the separation begins then it should continue easily.
Some pretty brutal pictures in that 2.3 MB zip
I have opened all four sides without any visible trace. No damage done. Yet