I always told my students that they were the most important person. If they had an issue, I would take it as high as I could to resolve it, but I would also tell them that this would just be "one channel" and they would also need to discuss their issues with the manager if I couldn't resolve them. This way it wasn't just one person talking to them, because management would often think that if they weren't hearing from students, they "must be happy". I told them that at the end of the day, they are the customer and though management might not like it, they aren't going to turn away a motivated paying customer, even if they aren't able to pair him up with the instructor that would be most "convenient". As an instructor it's to your highest interest to do the best you can. I've known plenty of low-time instructors that did an amazing job. They had the drive and motivation as students. Stopped and took the time to really understand things. Really knew how to explain things and provide useful learning.

On the other hand, don't judge an instructor by how "fast" they get you to a certain rating. Rate them on how quality they teach you and how much you learn. It's about quality of instruction and value.