Just read this quite long but really interesting article on 4thwavenow.
Particularly interesting was the third type outlined - Rapid Onset Gender Dysphoria (ROGD). The authors state this is almost always a type that occurs in natal females but also that it may affect some natal males. From my limited understanding of Madigan I wondered if it applied to him.
Obviously we don't know what Madigan finds a turn on and maybe he is AGP type. He doesn't seem to be childhood onset though, and he doesnt present in a typical 'male fantasy of women' way, very sexualised etc. The way he came across in C4 also seemed to align a little with the author's description. I'll post some of it here if you don't want to trawl through the article:
The typical case of ROGD involves an adolescent or young adult female whose social world outside the family glorifies transgender phenomena and exaggerates their prevalence. Furthermore, it likely includes a heavy dose of internet involvement. The adolescent female acquires the conviction that she is transgender. (Not uncommonly, others in her peer group acquire the same conviction.) These peer groups encouraged each other to believe that all unhappiness, anxiety, and life problems are likely due to their being transgender, and that gender transition is the only solution. Subsequently, there may be a rush towards gender transition, including hormones. Parental opposition to gender transition often leads to family discord, even estrangement. Suicidal threats are common.
We believe that ROGD is a socially contagious phenomenon in which a young person–typically a natal female–comes to believe that she has a condition that she does not have. ROGD is not about discovering gender dysphoria that was there all along; rather, it is about falsely coming to believe that one’s problems have been due to gender dysphoria previously hidden (from the self and others). Let us be clear: People with ROGD do have a kind of gender dysphoria, but it is gender dysphoria due to persuasion of those especially vulnerable to a false idea. It is not gender dysphoria due to anything like having the mind/brain of one sex trapped in the body of the other. Those with ROGD do, of course, wish to gender transition, and they often obsess over this prospect.
The subculture that fosters ROGD appears to share aspects with cults. These aspects include expectation of absolute ideological agreement, use of very specific jargon, thinking of the world as “us” versus “them” (even more than typical adolescents do), and encouragement to cut off ties with family and friends who are not “with the program.”
Obviously it's not my place to diagnose anyone with anything. Madigan just came across as so vulnerable and young in the interview. I can see the elements that seemed less benign too. But when I read this article which also said many of those with ROGD have other mental health problems, e.g. bpd, depression etc it made me think how Madigan didn't come across as a confident, happy person, rather the opposite.