Same sequence every arrow
Consistency is the technique.
Not your aim. Something changes between arrows, and you can't feel which thing.
Consistency is the whole sport. An anchor two millimeters off, a grip that tightens, a release that collapses — each one opens the group, and none of them feel like anything from inside the shot.
Video resolves it. Side-on footage at normal speed, slowed down, shows alignment and follow-through clearly, and the correction is usually one specific thing rather than a list.
Then it's repetition with intent. Blank bale work, structured sessions and honest scoring move archers forward far faster than shooting hundreds of arrows at a target face.
Consistency is the technique.
What you feel and what you do are different.
Safe backstop, qualified technician for equipment changes.
Twenty minutes, free, on six arrows and what to change first.