That's exactly the purpose of puberty blockers, which this bill is trying to criminalize

No, they are not mentally ill, and science has confirmed that it is not an 'illness' issue but more of a social stigmatization of a very real and natural condition. Frankly, it's none of your business if you do not understand them or comprehend their condition and it's as simple as that. Some additional reading for you: https://www.bbc.com/news/health-48448804

That doesn't give the Government a sweeping right to make that decision for an individual.

>I’m pretty sure most of us hated our bodies, felt tortured

And I'm pretty sure you've never experienced the level of bullying and hate that LGBTQ people face on a day-to-day basis. If you're for children having the right to live happily, then I also feel you must acknowledge that trans and gender-nonconforming adolescents have the highest rates of suicide and depression among any demographic. The decision on taking any potential treatment should be made by them in consultation with a qualified healthcare provider, not some random person on the internet who doesn't know their individual situation. In today's world, it is too easy for us to forget that individual liberty exists and needs to be protected. We cannot let legislation regulate every aspect of an individual's life because none of us are carbon copies of each other.