Ideally you need a double-blind checking mechanism definitionally impervious to social engineering.
That may be possible in larger projects but I doubt you can do much in where you have very few maintainers.
I bet the lesson here for future attackers is: do not affect start-up time.
I think a possibility is a series of open source anvil or nixos scripts that you can run on most hardware with minimal changes, in an extendable architecture of some kind to add or remove functionality and they perhaps get maintained by the community or some structure of the kind of Linux distributions.
This could enable people with minimal skills set up and maintain a reasonably useful but secure environment just by changing a few variables.