I think the pervasive instability of Haiti goes back farther than that though it's a contributing factor. Due to the endemic corruption in Haiti, the political would be powermakers have been using the gangs as their personal militias in a country with a weak and corrupt law enforcement and no actual military. Politicians using Haiti's gangsters to enact or attempt to enact coups has been a thing since the the 1990's.
Ironically, despite bringing in a typhoid epidemic among the other standard issues of bringing third world peacekeepers to any country it seems, the UN peacekeepers that were sent to Haiti in the wake of the 2004 Coup actually helped curb the gang problem for a while, because the Prime Minister at the time took on a similar stance as the El Salvadors President Bukele, but obviously didn't have the law enforcement resources or standing army... or any traditions of either to depend on. So as soon as the political tides turned and the UN Peacekeepers withdrew, things fell apart even moreso again and politicians used gangs even more to angle for political power.
It'd be worth ignoring, like with so many other sore spots in the world, but Haiti is sharing a large border with a more stable and prosperous state in the Dominican Republic, and is a large drug transit point for shipping drugs to America and elsewhere, so it's not something that can just be ignored so to speak by everyone else in the world. The record of foreign interventions in the country tends to be fine in managing the violence... but collapse soonafter as said foreign intervention ends.