I'd be interested to see concrete examples of this, if they exist.
One example that comes to mind is Patrice Lumumba's assassination, allegedly authorized by the American government. There is no mention to Lumumba's government that started in 1960.
Venezuela's entry has the same issue pointed out in the DPRK's - the negative impact of sanctions imposed by the US on the economy is not mentioned, and is described as "chaotic economy due to political corruption".
It is subtle, but it is propaganda as well.