Not all of it. Some really cool tech and high end military equipment comes from DARPA programs.
They are not just a group of people hanging out thinking up bad stuff although there are DARPA programs all over the place that don’t even know others exist.
Like anything else there are White Hat programs and Black Hat stuff going on.
I used to work in a lab that was DARPA funded. They are largely a funding agency that prioritizes and selects grant proposals for funding based on calls for proposals that they put out.