NO, you cannot recover this
As Nmath mentioned in their comment:
The only thing I can find about "resetter" is an abandoned GitHub
project. It seems like the purpose of this script is to essentially
restore your system to the state of a new installation. Looking at
what it was supposed to do, there's no surprise that interrupting it
halfway resulted in a broken system. I would not let a project like
this anywhere near my PC no matter what it purports to do, especially
an abandoned project. Why would you not just reinstall? Well now, you
will probably need to reinstall the OS anyway and restore your data
from backups.
There is no way to recover this mess. This project is deprecated and is no longer maintained. As, you can see on its GitHub page, they've removed everything from the README file. This indicates that they don't want anyone to use this script again. I can see that they have removed a lot of essential files too.
Now, the source code of the project cannot find those essential directories. If you go to this page, you'll find only /usr
and /etc/sudoers
files are there. This means that the script couldn't find /var
and a few more essential directories including /boot
. Apparently /boot
is still there, but there is no information about kernel and memtest, making your system unbootable. The source code of the script has clearly removed everything from your system (except a few things). Reinstalling is the only option.