To me, the red flag is that this teacher is so rigid. That's pretty much a disaster waiting to happen for my DD8, who you could have easily been describing.
There's a reason why these kids are referred to as exceptional. This teacher might believe that all kids need to be working at the same pace, but your DD is an exception. She may believe that all kids need to drill repetitively, but your DD is an exception. So yeah, if your DD was constantly subjected to rules and processes in which she saw no value, I'd be surprised if she didn't rebel. I'd expect it in mine.
