That doesn't make Calvin correct or double predestination correct, as you know. And I have read it. Who knows if he had lived longer, if he would have altered his view. We are all in a state of growth.
It is the idea of double predestination that is frequently attacked as an injustice and evil in God. And that does not make the attack valid, but imo it makes the justification of it somewhat of an evasive dance, that is settled by "God can do whatever he wants to do." I think the doctrine stems from not looking closely at a lot of other things concerning redemption. I am not saying they are not known, but not looked at closely, or considered, when dealing with predestination. The big picture, the end from the beginning and all of it as whole working towards the same goal, same end game, needs to be kept in mind, rather than narrow parts.
I have tried to do that, but there seems to be no traction, and I attribute that to my own lack of clarity, so I have said my piece.