Reading this dont look like she is pissed at her kid at all. It only look like she is pissed at everyone for not recognizing that her girl is the best. Many people are unable to act rationaly when they are angry, and it's common for mother to lose their mind when something happen to their kid.
And if you look back at what she said to the headmaster it show that she is not angry at her kid but at the one who didn't put her girl first.
might i direct you to page 2 and 3 ahem, to quote what the mother YELLS at daisy. edited to add in page 2's diologue
"
Daisy! what on earth is going on here?!
Have you forgotten about your duty to become the King's Student?!
I even got you a special private tutor over the summer holidays didn't I?!
AH, for goodness sake!
How come you've remained in second place ever since you started School?
Don't tell me you are lacking in self-awareness!?
Is this really all you are capable of!?
its absurd you are not the top student!
Need I remind you?!
Only one person in the grade can be chossen as the king's student!
You know that, right?!
"
now i am no expert her but doesn't that sound like someone scolding her child for something out of her control. acting as if its HER fault that she didn't achieve first place.
oh and may i direct you to page four about what she says when she finds out it was olivia who got the spot. ahem
Wha-
WHAT DID YOU JUST...?!
HER, OF ALL PEOPLE?!
THE GIRL FROM THAT NOBODY FATHER AND HIS STRANGE FAMILY...?!
now correct me if i am wrong here, but doesn't that sound awefully like she sees olivia as undeserving of the position solely because she is a commoner?
oh and this gem on page 7 when the sage asks if something happened to her daughter
"n-no her grades weren't as good as they should have been, so i gave her a little guideance."
you call what she said to daisy on page three as GUIDEANCE?!
i rest my case she is a bad parent.