So is your competence judged by your customers, your peers, or random outcomes outside of your control? To put this in software terms. This is like a person in a support organization being provided buggy software and being fired on the number of bugs that get through. They have no control over the developers (parents) and students don't go through QA. Even if the developers were trying their best, if they are constantly distracted and pulled in multiple directions, what do you expect that the result of the software would be?