Transitional governments often exhibit an especial degree of instability, as special interests jockey for power. But then, some governments are simply instable.
Afghanistan, which has no tradition of democracy, was led by the nose into it after the US invaded and temporarily dispatched the Taliban dictatorship. This naturally corrupt tribal society has been unable to get the hang of free elections.
But then, neither has the United States, despite advertising itself as the home of democracy. Various voting shenanigans are common in America, from gerrymandering to voter suppression to simply throwing away cast ballots.
However surreptitious, fraud is an ever-present undertow in elections. It begins with those who stand for office.