Supposedly some of the money is used by NGOs to help farmers,...
I figger the recipients are then required to pay tribute to the armies who are the actual gangs.
what are we supposed to do?

MORONS!

Not knowing much about the root causes of the violence in these countries I found the following article that provides a good overview.

[cfr.org]

It explains how the US has inadvertently contributed to the problems, but it is also clear that cutting off funding will only make the problems worse and lead to an increase in asylum seekers.

these countries are considered some of the most violent in the west. our money is being used by the militaries.... we should invade.

Then the Russians or Chinese will move in.

What a bunch of privileged asshole racists

Which is like saying too many family members keep using the upstairs toilet because the downstairs toilet stinks, so we will blow up the downstairs toilet and that will stop them using the upstairs one.

With charity comes interference and manipulation. The US has a long history of interfering in Central American politics and economics. Usually to the detriment of the countries within which they interfered.

Between supporting despotic right wing leaders and direct CIA interference in politics in El Salvador (remember the Iran-contra debacle), to forcible monocropping by the big agricultural corporations which destroyed locally economies, the US has a checkered history in Central America. Aide comes with conditions. Often the conditions are based on the political whims of the time and not what is best for the people in that country. Often they are decisions based on somebody who is either related to someone who has a company that has economic intetests down and stand to gain financially, or are paid by lobbyists representing same said corporations.

Maybe they do not want US "charity".