I've been watching the big powers veto sensible UN measures for decades. The US does it, Russia and China does it, it's a game to them. Waste of time finger-pointing, veto power is bullshit. It sez the rules don't apply to anyone in the nuke club.
To me, making political appointments for the judiciary always made this a possibility. It happened in the old days, and it might happen again. And it did.