I have created a world that you cannot escape the end in. You start with diamond armor and some diamond sword and a bow. All of them have Power V, Sharpness IV, or Protection V. Once you jump in the portal you go back to the spawn of the end. Bad Luck! Good luck digging out without a pickaxe 0_o.

Additional Notes

If you want to create a world like this by yourself, just use the present code