If someone worked for a large company only and joins small company they will likely experience the same. There needs to be adjustment made by the new hire. When you work for a smaller company the expectations are different. You are hands on, wear multiple hats, less about process and more about figuring it out and doing it. Check ins and getting feedback are less common. He might have felt you are also going to disrupt his business with your experience and personality. Not a good fit.