Try this for annoying: I received on Friday a letter from the DVLA - the British government department that handles vehicle and drivers' licences. About a month ago I submitted a form to notify them of my name change for the registration of my car and Friday's response from them was pretty much as follows:
Dear Mrs OldName
We notice you've sold the car. We can't send the new owner any documentation because you haven't provided their address. Please provide this info.AARRGH!
I sent her back a very snotty letter, pointing out that I haven't sold the car. I filled in their form precisely as instructed and didn't tick the box to say there was a new owner, so she has no business thinking that it has been sold. (She'd even included a photocopy of my form, which proved my point).

I pointed out that I doubt I would've received this letter if I'd merely changed my name due to marriage etc. and that I believe I only received it because the title & gender of my new name is different than my old name.
In the UK, it is unlawful to treat people less favourably on the grounds of gender reassignment so I pointed out that she's breaking the law by treating me less favourably than someone who isn't trans. I said I expect a letter of apology to accompany my new documentation, and I asked that her department be more considerate of the needs of their trans customers in future.
Thanks for the bout of dysphoria, DVLA lady.