That's not what propaganda is. Propaganda is much much bigger than that. First, if state media is propaganda then you have to discard BBC, NPR, and Al-Jazeera, among many others.

Second, if you only look at state media you miss the decades of infiltration and manipulation of Fox, NYT, AP, and many others by state actors.

Third, if you forget how class works, you miss the centuries of propaganda produced by private media companies with leadership that collaborates with the state to maintain and expand their power.

Example, when China banned opium, it was British merchants who owned newspapers that published inflammatory stories calling for the royal Navy to intervene, this starting the Opium Wars.

You HAVE to read everything because everything is propaganda and you ARE capable of learning from it without being swayed by it.