His style of teaching didn't match your style of learning, so you refused to give him a chance. He tried to teach you to play 10 minutes and tried to tell you what you shouldn't do, but you rejected him after two lessons. The way it looks, he's not a bad coach; you're a bad student.
Bad experience with a coach

He might very well be an excellent player. And maybe for advanced players he would be a fine coach. My understanding of the game is not at a level where I can make that determination.
re: the large text
Nah, from what you said he sounds awful. Doesn't have the first clue about how to teach.
I'm a coach too, and that definitely sounds like a horrible experience that you had with Charles. That style of coaching would certainly not cater to your learning needs. I guess his approach was a complete misfit for what you really needed.
It may never be a good idea to pay an x amount upfront to a coach. Individual payments are better.