I get how that sounds. What I mean is that I'm invested in the style because I have put a lot of time (including a ton of supplemental learning outside of the school) and money to get to where I am at. So at this point I want to continue in American Kenpo and will pursue other systems later on.
As students get closer to their first black belt they have seen enough of their path to realize it isn't perfect. Not just the school, but everything around it. There are often politics, students passing tests without skills, good students not given sufficient challenge, etc. This isn't limited to commercial schools, every instructor is human. We all have strengths and weaknesses and if we run a school of any size those weaknesses tend to be magnified unless we pursue them diligently.
You've invested a lot of time, energy, and money to get where you are, and you're seeing challenges in your school. This is normal. Looking for another school is also normal, but I would encourage you to be abnormal. Accept that all martial arts skills (and schools) are dependent upon, and must conform to, the individual. Each of us has capabilities and challenges. Each of us has goals and limitations. Many of us have trod the very same path you are on right now, even though we study completely different arts.
If I were to advise those like my younger self all those years ago, here's what I would tell us.
1. Read Rory Miller's "Meditations on Violence", and then meditate on it. Maybe even take a weekend mini-retreat and really think about why you are training as you are. What is real, what is important to you? What goals, capabilities, challenges, and limitations do you have. Rory's book challenged everything I thought I knew about martial arts and helped me find a much stronger path.
2. Set up someplace outside of school to train. My garage is my space, and I will be adding gear as I can afford it. Find those students who, like you, are looking for more. Invite them over to train with you at no charge. You're not setting up your own school, just practicing with friends. Encourage them to question everything you and they think. Have them read Rory's book, and then work through the next series of questions.
3. Stay where you are and respectfully show your ignorance. If one instructor tells you something different than another, ask for time with the two of them and seek understanding. Be on a quest to learn more from your seniors. There is a saying, "We never learn so much as when we teach." By asking the two instructors to help you understand, you will be helping them. They may not realize they have a different thought on the technique, and your connecting them can make them better instructors.
4. When you get your black belt certificate, respectfully say "Thank you". At that moment you hold in your hands a license to really learn.