I dont want to hate on eritrea because there not our enemy . But there's a reason people compare them to north Korea. Military service in eritrea essentially never ends. They have almost no internet acess, they have no universites . I mean hundreds of thousands of people fleeing a country of like a couple million is insane and goes to show how bad the situation must be.
Now this is not too say they will collapse or that there can't be a peaceful transition of power. But a revolutionary govt where the first guy is still in charge after 20 years and has silenced many of his froerm allies? I think its unlikely that a power struggle doesn't break out.
The military conscription's is because they are a small population and they have a neighbor with large population that is antagonistically wants to annex them if given the opportunity.
It actually had similar approach to military enrollment as Somalia back then, 6 months of training and 12 months of free military enrollment, focused on mostly nation building and development but then Ethiopia ignited a border war with them 1998.
It ended in 2000, but what came with it was condition of no-peace, no-war , which led into an indefinite military conscription and mobilization around the border.
I think they have like 1 general university and 6 specialized ones. Their literacy rate is 93% so you cannot say they don't value education or make it widely available, but it's mostly primary and secondary to your point.
I believe the bigger culprit in this is Ethiopia, because without them letting go of their asspirations to claim and annex Eritrea, the situation will most likely sustain itself.