https://nypost.com/2022/06/18/detransitioned-teens-explain-why-they-regret-changing-genders/

https://www.reuters.com/investigates/special-report/usa-transyouth-outcomes/

These forays opened his eyes to the online abuse detransitioners receive – not just the usual anti-transgender attacks, but members of the transgender community telling them to “shut up” and even sending death threats.

https://www.webmd.com/sex-relationships/news/20220322/doctors-have-failed-them-say-those-who-regret-transitioning

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I could go on. There's tons of stuff out there.