I really don’t blame American citizens for this. Rather, I blame this on politicians who gin up false narratives about terrorism, foreign enemies, etc, because they don’t actually know how to govern. These same politicians are also on record as being against things like public schools teaching science, against acknowledging all the bad things the US has done. In other words, these politicians are grooming US citizens to remain in the dark about how bad and stupid things can be, not just now or in the future, but also about how those self-same political opportunists created a lot of chaos and pain for generations and generations before that.
It’s complicated. What is good is that we have a press that, although battered and abused, still seems to be functioning enough so that the stories like you mention do get out. And, if we really want to go into the debacles of the CIA, there’s plenty more that have happened over the past several decades. The Congress didn’t create those debacles directly for the most part—bad screening and poor internal controls, bad training, and poor leadership, etc, caused that within the CIA itself.
What we can blame Congress for is for ignoring obvious signs of rot setting in throughout the federal system. In many cases, the GOP has femented that rot even further…while DP leadership the past two decades has only been half-heartedly trying to stem or fix the problems… at best.