Many schools don’t offer a film class at all, so I don’t think it would hurt to drop the class. Talk to the counselors and tell them what you’ve written here, that your child finds the class stressful rather than helpful and the teacher is not a good match, that your child would rather get her experience outside the school. It sounds like her portfolio will be fine without the hs film class, advanced or not.
There was one teacher I had a big problem with for my kids senior year. It was a semester long class (personal finance) so one kid had him 1st semester and the other 2nd. I’d requested the 2nd kid not have him but he was the only one who taught this and her other choice would have been to take it online. Well, 2nd kid just put up with this jerk and kept me out of it (smart move on her part). I wish I would have fought harder for the first kid to drop the class and take it online. In 13 years of school, he was the only teacher I felt was unqualified to teach children.