I have to come clean and say the archer is the thing that makes the difference.
The hair trigger that is often associated with the simple mechanisms in some low priced wrist strap releases, is something that can so easily lead into being hesitant, as they can go off as soon as you touch the trigger; and often that is TOO soon. The shot goes before you are fully ready. Next shot is a deliberate attempt at not shooting too soon, rather than focussing on how it should be done. A stiff trigger gives you the chance to get your finger or thumb onto it without having any worries about releasing accidentally. A security like that is a great advantage.
The stiff trigger, does require a deliberate effort to activate it; especially when you are learning how it should be done. The deliberate triggering sets the pattern that has to be copied on all the rest of the shots. It's like fastening laces; it takes a lot of concentration at first; but eventually we tie them without even looking. Fastening laces is far more complex than activating a trigger.
The biggest problem with triggering any release aid is to find some shots go too late and only a few go on time. The archer then wonders what is wrong with the release aid; perhaps the trigger is set too stiff etc etc.
The chances are, the amount of triggering pressure is not the same shot to shot. We anticipate when it should go, or we get distracted by the sight, and leave the triggering to chance. Triggering is a skill in itself. Changing settings or changing the release aid, simply means we have to start the learning process all over again.
Get a release aid with a decent trigger and make it work by deliberately triggering to one plan; the same plan every shot.
Don't try shooting scores while learning how to get the shot to go off as you planned. Shoot with a sight and a target to aim at, but focus on what you are doing to the trigger. Make sure you are drawing the bow while you are adding pressure to the trigger. If you ease up on the pulling, you are changing the shot pattern. Score each shot by how closely you kept to the plan. Score 1 if you stuck to the plan and score 0 if you didn't.
It is rewarding, but not a social event. It takes a lot of concentration and will power.