If a nation lost 90% of their men, they would be completely doomed. As men are the ones that actually build and maintain basically all the infrastructure and have all the jobs that are actually indispensable.

A nation wouldn't lose anything for not having personal to do all those comfy PR, HR, "therapist", etc, etc, jobs created for modern "progressive" societies to pretend women are just as indispensable in the work place as men.

But it would be completely wrecked if there weren't enough men to build and maintain houses, habitation, do the all the heavy jobs, take care of waste, infrastructure maintenance, work on the energy industries, etc, etc, etc.