The little I know,
You believe we are discussing baalei aveiroh. I do not. I believe we are discussing a choleh
I think the reality, predictably, is in the middle of these extremes. Can hurtful experiences at the hands of parents and schools help drive a child off the derech who otherwise would have stayed on, R”L? Certainly. At the end of the day, however, in the absence of a severe disorder, a young adult is responsible for his own choices, and cannot endlessly abdicate his responsibility by blaming mommy and daddy, or Rebbe Meany. Hashem gave him those parents and teachers, and yet he is still obligated in the mitzvos.