d/e) The world is fucked, and aging autistic men have little to look forward to.
Anthony is probably really unhappy with his life due to all of the aforementioned factors. Furthermore, I'm pretty sure he doesn't believe in God so what's left for him? To rot away as an obese dude until he keels over from a heart attack? No, he's going to create his own personal heaven he's seen in all of those little girl slice-of-life animus where everybody lives in a secular idyll that's a mish mash of the best parts of this epoch in global capitalism. Additionally, I'd wager that's why all the stuffed animals. It's sad, really.
Then there's the clout. Sure, it's not like the average normie is extremely happy with trannies right now. But IT loves them, and trooning out gives him an entire "sisterhood" of like-minded people who'll further fuel his delusions. Autistic Tranthony gets to be celebrated just for being himself - something that the average man sorely, unfairly lacks these days, as we're all pushed to keep up with the Joneses, and outdo them too. Which of course, is especially harder on the autistic man. Autistic men are routinely belittled, compared to serial killers, and still expected to wagie through it all as if they have no challenges whatsoever.
tl;dr it's a magic bullet cope in face of his own mortality, godlessness, and societal expectations