Completely broken experimental worlds

When I saw the warning that an experimental world might have issues, I never expected it to erase seven months of progress. Literally every block I placed in my most favorite world is completely gone. All the structural blocks, all the command blocks, all the wiring, everything. The entities I had placed in the world are bouncing up and down it insane speed, and I can't do anything to fix it. My backup had this same issue, as well as my backup's backup. The amount of frustration and sadness flowing through me as I type this bug report is absolutely indescribable. If you know a way to reverse this and get my world back, let me know immediately. The images below are where parts of my world used to be, now replaced by nothing.