Cornell University has studied all the peer-reviewed English articles about gender transition from 1991 to 2017 and found overwhelming evidence that social and/or medical transition is a positive thing.
Among the positive outcomes of gender transition and related medical treatments for transgender individuals are improved quality of life, greater relationship satisfaction, higher self-esteem and confidence, and reductions in anxiety, depression, suicidality, and substance use.
…regrets following gender transition are extremely rare and have become even rarer as both surgical techniques and social support have improved.
Anti-trans activists and their friends in the media repeatedly claim the opposite. They’re lying to you. There’s an ever growing body of evidence showing that letting people be themselves is great for their mental health.