That scene in the truck that Misty mentioned is a low moment, for sure. As were the scenes of her in the clubs singing. But the worst moment, or the least favorite moment for me... was definitely the "I HATE YOU! I HATE YOU!!!" scene. The cameraman really did a job with that, didn't he? Showing from Philo's point of view what it was like to have that yelled in your face and being hit... whew.
I hope to god I never have to endure something like that. That would be awful.