I had the same experience with a mentor who was very experienced. He expected me to know things already and he was very unhelpful/mocking when I was not up to h

I had the same experience with a mentor who was very experienced. He expected me to know things already and he was very unhelpful/mocking when I was not up to his standards. It was a really humiliating experience. I think the more people know, the more head strong they become. There are very few really knowledgeable people I know who remain as humble as you can expect.