I have a teacher and we have discussed the problem. It's not an intonation problem, it's an uncooperative hand issue. Try as I might, the fingers aren't following directions. Mandolins aren't the answer for me...going from NO frets to frets is a nightmare!
A break is definately in order and in process. Glad to hear that I'm not alone with these frustrating moments. My violin remains in it's case....haven't turned it into kindling just yet........