system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why were giants such a big problem during combat such as in the "Battle of Hogwarts"?

I've read about the Battle of Hogwarts in the new edition of "Hogwarts: A history", on the 'recent history' addendum pages that were added by some lawyer turned politician called "Hermoine Granger" (why they allow politicians to make changes to our books is beyond me. Education should be beyond petty politics trying to push an agenda, but that's another point entirely).

She writes that the death eaters had some giants at their side which were supposedly terrifying and created a lot of casualties on the other side.

My question is this: How can you miss such large creatures? Reportedly, the use of the death curse on allies of voldemort had been allowed. Other spells should have easily had a large effect on such huge creatures as well. Why weren't they easily slain, compared to the fast and small human wizard opponents, who were much easier to miss?
gpt
It's not that you can't miss. It's that it takes a lot more magical power to take down giants. When they were trying to take down Hagrid in the 5th book (I think?) they kept hitting him with spells but it didn't bring him down. He was only a half giant.