Among the top causes for death among Russian males is alcohol poisoning, neurological damage from repeated alcohol poisoning , damage caused due to long term exposure to contaminants included in poorly crafted moonshine, and often suicide related to injuries like blindness due to bad bathtub liquor.
I dont know about those other countries but there might be a connection.
https://www.cia.gov/the-world-factbook/field/alcohol-consumption-per-capita/country-comparison/
Russia #56. Below many countries with better life expectancy.
Something genetic.
Among the top causes for death among Russian males is being in a meat wave.