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.
The idea of personal responsibility to do and be everything right is inherently right-wing, people are products of their conditions. We are no more intelligent than normal people, we just got the info and chances to think differently