Here is my take on this. God is able and often takes people out of their suffering though we can not see it. He lessens it on the person going through it. In scriptures there is a great deal of some people experiencing things that others do not and a lot of suffering that a person should have experienced that God shielded them from.
In this case God sent His daughter into this world, the powers of this world (AKA Satan), went to destroy her. God did allow it in this case, but IMHO providing her with needed protection from torment during that time, and in the end world forces could not have her give up on Love and hope as we see her hugging the stuffed animal. It is very possible that God could have created a real soul in that animal to comfort her.
Yes her body was destroyed but her soul was freed of this evil place, and God won as she didn’t give up on God.
In Job we can see the battle for God’s children, who will have them, Satan or God. The children that Satan gets are the people who seek to control others, without love in their heart, the ones that torment and kill others as you expressed. The ones that destroy.
Also in Job, who is one who experienced suffering, we see the point of suffering, to show us our error that we would never have learned any other way (Job repented in the end). I believe any suffering God does not block and allows us to experience is only the suffering we need to realize our error, in other words God blocks all unnecessary suffering.
Eventually all that destroy will be destroyed and learn that the choice they made (to be evil) was wrong, and effects of karma (scripturally you reap what you sow) means that eventually they will not be strong enough to stay evil, and have to request that God takes custody over them instead of Satan.
So all children will be saved, it’s just a matter of how long they can resist God and stay evil.
But for the little children of God such as this girl IMHO she didn’t suffer what we saw and assumed she did, for if she did God would be a monster, and that’s not the God I worship. My evidence of a good God is her still hugging that bear, her innocence was never taken.