Mr. Miyagi, what a great hero!!??
Let's see what do we know about this guy. As a youth, he steals his best friends future wife (probably defiled her), then leaves her to bear the shame and a life of loneliness. He maliciously and mercilessly beats up a bunch of high school kids. He encourages Daniel to break the law (driving without a license). He paints Daniel in a corner, forcing him to fight for his life in the tournament (Hey, Miyagi ever heard of the police or the justice system). Then he makes Daniel his indentured servant so he will fix up his crappy, dilapidated house under the guise of "karate". He could have easily stated do these motions to learn some karate, but no he wanted free labor. He steals someone's black belt from their bag. This was not only theft, but he caused some poor young kid to miss fulfilling his dream to compete in the tourney. Miyagi was a violent, thieving, manipulative scofflaw. He used and abused those around him and would stop at nothing to get what he wanted. He was such an egomaniac that he made Daniel fight under the Miyagi-Do-Karate name. Kreese didn't even name his dojo after himself. Miyagi was deplorable.
2 things. 1.) That is your opinion. 2.) You are wrong.