After reading a few comments, I'm glad I'm not the only one.
The author tried so hard to make a background story for the protagonist which came out lame. Seriously though, is the editor nor the publisher did not see how unnatural it is for a mother that wants her son to be saved, but no gratitude or relief came out from her mouth?
Even though it is a different world with a different view towards something, that would not be appropriate words for a worried mother that just got her son safe and sound. If only that cruel words can come from others around her, that would be much acceptable. Like her son whose innocent enough wanting to tell everyone of her heroic teacher, then the people start gossiping and shunned her.
tl;dr: I'm disappointed about this backstory, hopefully it will be much better as it progresses.