Maduro isn’t a socialist, Chavists aren’t socialists and he’s openly a Chavist (i.e. a follower in the tradition of Hugo Chavez, who was a great progressive but not really a socialist).
I don’t give a shit what the Carter Center has to say about any of America’s enemies, and they provide no means to evaluate the substance of the claim by “experts from the UN” (which is different from a report by the UN or an official committee of the UN).
And, again, Maduro did not appoint the judges; he doesn’t even have the power to.
Maybe most pertinently: Do you not remember last election cycle, when all the neoliberal news outlets were joined together in their outrage over the NED and friends saying Maduro stole the election, only for that claim to “just turn out” to be pulled from thin air? Do we need to do this every six years when a US-backed reactionary loses?