Propaganda doesn't totally rob people of agency free will (more accurate term), if it did this site wouldn't exist. People do have the capacity to develop critical thinking, skepticism, and a basic curiosity about the world that allow them to develop some resistance to propaganda.
You can hold people accountable for failing to even attempt to do this.
And that right there is privilege gone unrecognised. Not as much of a privilege as some others, it's still the sum of something. You didn't will yourself into questioning your position in life, nor were you struck by lightning to do ao.