I'm not particularly interested in comparing more or less bad at that scale, especially because then we need to start asking really gross questions like "is the great leap forward more worse than the Atlantic slave trade because it killed more people, or less worse because it only killed more people because the population of the affected nation was far larger?" which leads to bizarre and strange considerations like whether the life (and death) of a single Chinese peasant is worth more or less than that of a West African enslaved person.
It's enough for me to say, "that was bad and shouldn't be done again." I would resist anyone trying to do that again.
