Haiti was originally run by the Spanish. The French took over in 1625 and created what was described as its best colony. Thanks to a democracy movement in the late 18th century, Haitian slaves eventually defeated forces aligned against them. Many French troops sent to put down the slave rebellion died from disease. Eventually, the victorious slaves slaughtered almost all the remaining French colonists.
So the slaves were free to run their country with little white interference for a century. What was the result? American troops were occasionally sent in to restore order starting in 1917. Billions of American dollars have been sent to Haiti to help the people.
It is still a sh*thole, because the native people made it one. Whether the U.S. intervened or not, the result would have been the same. Haiti is an awful place because their people made it an awful place.