Why can't I extract the display?

Approximately two months ago, I accidentally partially destroyed the display of my Fairphone 4, and after various struggles in terms of buying and selling, today I finally managed to get a replacement ready to be installed.

I prepared myself and started the official video available on YouTube. Fully charged battery, screw container, cloth, plastic card, and screwdriver at hand. Everything is ready.

So, I begin, initially struggling a bit with the trickier screws, but soon I find the method. However, it doesn't seem to be enough because when I try to remove the screen, even though all eight screws have been removed, the bottom part, below the SIM slot, remains firmly in place.

And that's the story of how all the waiting has been wasted so far.

I also tried to disassemble the rest, but the bottom part, secured with six silver screws, even after removal, doesn't alleviate my difficulty, while the side part has hexagonal screws, so a crosshead screwdriver doesn't seem to be enough. Now I have reassembled everything except for the eight screws attached to the screen, to see if someone responds today.