This teacher is obviously being disingenuous. However, I’ve never understood why you have to use pronouns at all in these situations?

If you are so offended by pronouns then don’t use them. However, you will have to go by their name and if they tell you to refer to them as Adam but you’ve only ever known them as Eve, call them Adam.

If they continue to refer to you as Eve you simply say that’s not my name and refuse to respond to a name that is not yours.

If he punishes you for it, you ask him to cite other examples where he called someone by their wrong name and they were punished for his mistake.

I will guarantee you she can find examples from that school where kids have changed last names due to adoption or other paternity issues and some have probably changed first names as well.

Put the onus on him and his behavior! This isn’t about a trans student, this is about an asshole who is getting his rocks off on bullying a trans teenage kid.

Of course he won’t see it that way and he will never agree to call a trans kid by their preferred name just like he will call them by their preferred pronoun. However, you’re not trying to win him over, you’re trying to win over reasonable people. This approach at least it takes away that bullshit argument and puts the onus back on his bigotry, not the school’s policy.