The Jinn role is that of 'willing tutor'. For me, the foundation of Anakin's fall was placement with a master (purely titular until Episode III, by the way) just going through the motions; unlike Qui-Gon, Kenobi didn't want him, thus didn't keep as close an eye on a certain befriending as he should've...
"I have failed you, Anakin. I have failed you."