The main problem, as I’ve already pointed out in this thread, is that aidanbradypop’s idea is actually self-contradictory. If the punishment for our sins is eternal damnation, then Christ – to actually take on that punishment – had to be eternally damned. Being dead three days is not the same as being eternally damed. One cannot just say that ‘well, he was stronger.’ Because the point there is that he was punished so that we didn’t have to. But if he rose after three days he wasn’t punished eternally, and thus did not take on our punishment.
To point out the absurdity of this self-contradiction, note that aidanbradypop’s view actually entails that Christ underwent a three day long eternal death.
The point is that Christ didn’t take our punishment. Christ was not punished in our place. Christ atoned for our punishment by giving God satisfaction. And, as St. Anselm points out, punishment and satisfaction is not the same thing: aut poena aut satisfactio, “either punishment or satisfaction.” Not both.