Galadriel is extremely unlikable
I get that you're on an obsessive mission to get revenge for your brother and get the job done, but there's no reason to be constantly short with everyone you meet or even talk to. A smile to someone could do wonders in your favour. (Well, we did see her smile on that horse, so nevermind).
But this is over-the-top anger that's not even necessary. The writers really botched this. She's irritating as fuck and makes the show really unenjoyable to watch.