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.
Punch a black belt in the face, he becomes a brown belt. Punch him again, purple.
There is no reward without sacrifice.
If you want to be a lion, you must train with lions.
If your opponent is tapping, your technique is good. If he is not tapping, your technique sucks.
Life is yours, do not let life's problems have other influences on what you believe. See for yourself.