Sorry to hear that. Chalk it up and move on without any hard feeling. Don't bother to analyze it if he hadn't given you a reason.
Having said that, sailing a boat across the pond in the tight quarter is not a small task. Age, personality, education level, personal habit, skills and etc are all important. He does not like you to sail with him, it does not mean you are a bad person.
Just find another captain, and keep on leaning. Good luck.
I read, think, and act independently; I don't come here to win a popular contest, nor I am here for free sex. I come here to learn, be challenged and be inspired in the art of safe off-shore passage. I am NOT afraid of dying in the sea, but I am afraid of dying in a nursing home and burdening those who I love.
I am old school; doing the right even when no one is watching is important to me.