As long as we make stuttering a battle it seems to get worse. I was a pro athlete and tried bringing the same mentality to overcoming stuttering, it failed miserably and actually would worsen. It’s more of a letting go what supports it, slowly. The self image, scanning ahead for word, victimizing oneself, physical speaking tensions, anything and everything the supports the mental internal structure of it. It took me years. It does lessen as you go, and those very successes work in your favor. Long game.