It's awful to learn something like this, and I do have a bit of sympathy for the poor fucker who not only learned that it happened, but learned it in this particular way.

That said, however, I find myself wondering--as I do with all detransitioners--how they treated the people in their life who tried to dissuade them from doing this before they went all in and learned the awful truth behind the lie. Because I've seen plenty of evidence of horrible toxicity towards "transphobes" who won't validate or approve of transitioning, and plenty of things to say afterward about the horrible people who helped push them over that particular cliff's edge (and almost never any blame on themselves...). But I've never seen or heard of a detransitioner who acknowledged making up with anyone who didn't support them when they were destroying themselves.