If you want to be a lion, you must train with lions.
Life is yours, do not let life's problems have other influences on what you believe. See for yourself.
You should be a missile and go and destroy your opponent.
Punch a black belt in the face, he becomes a brown belt. Punch him again, purple.
If your opponent is tapping, your technique is good. If he is not tapping, your technique sucks.
The best way to get a move to work is to make it so uncomfortable that the opponent gives it to you to stop the pain.