Well, Belarus also inherited a few nukes from the former USSR IIRC, so if they didn't hand over said nukes, they could have become a NK-esque rogue state.
For 1. Belarus didn't want the nukes, 2 Belarusians are generally pretty peaceful people, they have had their share of bullshit poured upon them. 3. The greatest enemies of Belarus are 1. Belarus and 2. its largest neighbor. who it just happened to become independent from.
4. it was a requirement to give up the nukes or at least asked nicely < cough cough> . it was bad enough the soviet union was falling apart, but a whole crap ton of newly independent nuclear powered nations with an axe to grind wasn't a great idea.
Honestly, you would need a revanchist Poland and Lithuania and in which case others would tell both Poland and Lithuania where to go screw themselves. Belarus prides its claims on being greater Lithuania, because well. it was the largest territorial part of old Lithuania.
Belarus is a lot of things, North Korea its not. ( even after decades of sanctions ) if it was so bad it would just be reabsorbed into Russia. Belarus may not be exactly the model of western life ( and that may not always be a bad thing) , but it is quite far removed from being a tin pot crap hole that north korea is.
if they had to have nukes, then I guess you would need to choose an ex SSR.. otherwise you need population and resources to actually be a threat. if you just want to be a shit hole.. go to transnitra
Have Romania survive under communism.
Its just if it was that bad in Belarus.. they would have been absorbed. the difference is that the north Koreans fear the Chinese as well.. hence why they are the hermit kingdom. they don't like china, they don't like Russians, they don't like the west..
the ex SSR's Russia included learned a valuable lesson from the collapse of the USSR. bread and circus and provide western goods. keep the population distracted. ( same thing used in the west )
Belarus would have collapsed in the late 90's if it pulled a north kroea