That's no fun DX But, on the other hand, maybe she could get lucky and find herself working with some really lovable students who aren't too hard to deal with and teachers who'll help her when she needs it and altogether she'll have a good experience! You never know, though XD;
And I bet it would be sad to leave a job you've had for so long (never happened to my parents, and I hope it doesn't ><;). Even if you know you're going for the option that's overall better for you, it's still pretty hard to quit something you've pursued for a long time. It's probably one of those things you should mull over a bit before deciding on what you want to do, if anything.