I think there is some degree of truth to it. For starters, there will definitely be somebody out there who pre-emptively blames the CIA in bad faith for the Legos their toddler left on the floor. And there are places the CIA is trying to infiltrate so hard, it actually was the CIA most of the time, so it would make sense to accuse the CIA. The only value an actual investigation would have is outing the mole. Maduro has the right to be paranoid and the mandate to be vigilant.

This wouldn't be Maduro's fault. The CIA created this environment. I don't particularly care if Maduro lied about the CIA once or twice. If he's a villain at all, he's not the Sauron/Voldemort of this story.