That's a really fair position Quarks and I'm not going to try and move you from that interpretation.
Mine, however, would be more along the lines that this is a prime example of how someone really vulnerable and unhappy, as a last resort after years of trying everything else to find peace, finally took drastic steps to find a way that they could live with themselves.
And that even though that difficult personal choice brought them, in private, greater peace and happiness than they had experiences thus far, the public lack of acceptance, discrimination, misconceptions and outright abuse led this person to hate those that had ever offered this path up as a solution.
But isn't it clear it could so easily have been the solution, were it not for the negative reactions they received? It doesn't seem to me that there are any guarantees that holistic therapy didn't involve transition would have achieved anything at all, and yet there does seem to be evidence in that article alone that the answer for Tarquin could believably have been transition in an accepting society.
Anyway, it's not my place to speculate what could have been, and if Tarquin says it is the transadvocates they now blame for their predicament then I am obliged to accept that as their current worldview. Along with a lot of their other worldviews as they previously accepted here on MN.