Why do you come back to points that were addressed?
I explained that a past life is not him. It is a Neshama that he got from someone else, which needs a Tikkun. As the Ben Ish Chai I quoted put it, he is suffering for someone else.
The Medrash at the end of Shemos describes how, when Moshe Rabbeinu saw Jewish children being killed, he complained to Hashem. Hashem then told him to take one out, who then turned out to worship an idol during the Krias Yam Suf. Does that make Paroh right? Obviously not. It merely means that in the big picture, nothing escapes Hashem’s will.
Toras Hagilgul shows us that there is a plan and a big picture. It’s not about how this person deserves it. I stressed this above. There is more than one dimension. And as Zahavasdad mentioned, what about everyone else who suffers along?