Regarding the world, it clearly isn't attempting to be 'hard' or 'realistic' regarding how magic works or anything of that sort. It is very fast and loose with details and that is just fine for me.
But regarding the people in the world, this is something that I think the author got right. The system set up running the world has obvious logical flaws in it and places where abuse or bad stuff happening is obviously a risk.
And those consequences are shown and handled well. The dangers of the witch-mentor relationship are clearly shown. The dangers of sending out children on their own on jobs or quests are clearly shown. Just because they have magic doesn't change that they're children.

While it is undeniably a pretty sweet series, the acknowledgement of how toxic a magical world can be is handled well and often with some tasteful restraint.