Tbh, what did they expect from thousands of people who ever were accustomed to violence (violent criminals from prisons) and the people who got a taste for violence serving on the front?
Lack of effective policing when your police is infamous for being corrupt and most of your auxiliary forces are on the front or near it will not help them either.
I am from Lithuania and we still have a lot of social problems that date back to the Soviet-Afghan war. Lots of men who served there either took their own lives or are currently drinking themselves to death, even 40 years later.