What was the actual sacrifice that Jesus made?

[Anomalocaris]

As I understand, the separation was not one of essence, but one of relationship. God being (so to speak) one what in three whos, the Son had never not been in communion with the Father until that point in time. It's a kind of suffering one who is one person might not be able to comprehend. There is also some biblical evidence that the past and the future are experienced eternally as the present for God, and that God remains unchanged by the events of time. If this is the case, there might be some sense in which the suffering of God never ends and is, like God forever.

You are correct about them believing that the past/future is the present for God. That sort of theology was also common with Dionysus and Attis.

So suffering is but a permanent unavoidable state for god. Nice of him to make a virtue out of necessity and try to compel us to thank him for that which he neither effected nor could have avoided.