

Seems like removing the file from /home/YOURUSER/.config/autostart/ ought to have undone the problem. Booting from external media of course, so as to be able to get to it, which you have to do anyway to reinstall.
I realise this is long after the fact.
Having something just sitting there in /usr/local/sbin shouldn’t have any effect at all, so I can’t imagine that was the issue, so calling it must be.
And the only thing I can think of is if there was a permissions problem and Cinnamon choked because the exec-er refused to run.



If I correctly remember the minimum number of moves required to get all the disks from one tower to another, 10 layers is going to be a slog.