FWIW, I have only been trad shooting for 3 years. Took me 1.5 years to become consistent.
3 things finally brought me to a repeatable comfortable form :
An experienced friend with some good back muscle tips and straight line tips
Rod Jenkins on Masters of BB 3
An finally another friend who won the Howard Hill tournament in Alabama several years back.
His tip was the final cap on my getting consistent.
I am the one who says the prayer while at draw. I am a straight up no cant 5 second hold shooter.
But, once the local tournament gets crowded and there's alot of talking and noise, it is over. I will miss entirely easy targets and have to go look for my arrow.
Back at home on my 3d range, or at the local range with one person and a quiet range, like where you can actually hear the woodpeckers, squirrels barking, etc, and I am on target.
I am a hunter. I just don't like crowds & noise. So, pay attention to mental distractions too.