I have no administrative account after updating to High Sierra 10.13.5
Wow. You certainly have done several steps to remove the AppleSetupDone file. I would try the most correct one 

cd /private/var/db 
rm .AppleSetupDone
ls -la
exit


The ls is just to be sure. If that doesn’t workyoull need to reinstall the OS or erase install if you don’t need a backup. Let me know in comments how the last try to remove the setup file works? (all those allocation zone messages have me thinking your storage or data on it are messed up beyond easy repair)