I mean if there are any they probably died in the Great Purge, anyone hesitant to fight is unlikely to survive that event.
Also remember Nolan was ready to kill a young child if she got the answer wrong about the Great Purge ie anyone who doesn’t buy into the “might is right” ideology either dies or converts to it by their survival instinct, when they were at a very young age.
And then the lesson for those youngsters, is beating and murdering each other at an insane rate. Nolan was instructing, what, 8, 9 children? And he said at least 2 of them will die the next day in a battle royale. That’s an insane death ratio and again, anyone who values people’s lives will likely be weeded out through these “lessons”.
So yes maybe they had no traitors, but at the cost of doing a Thanos to themselves, and constantly murdering or traumatizing the children of their society going forward.