I mean, I'll take a stab at it... the electoral college can be argued from first principles if you consider that the U.S. was supposed to be a federal union of sovereign states. There are certainly reasonable arguments for federalism and devolution of power.
The U.N. doesn't directly elect the general secretary.
Is that an argument against the electoral college, or an argument for re-devolution of power? Because the latter is probably easier to do than getting rid of the electoral college, given the requirements to pass a constitutional amendment.
The U.N. doesn't directly elect the general secretary.