maybe I never developed a good style to begin with?
I don't know if you have or if you haven't, but other comments you have made seem to indicate that you've developed target panic. Shooters at all levels, including some with excellent form and impressive records like Rod Jenkins have developed target panic and have had to work through it. Others have never experienced it.
I don't know that anyone really understands it, but Jay Kidwell, the author of
Instinctive Archery Insights, has proposed the best explanation I've heard. He also has a section in Masters of the Barebow 4 on this subject.
Solving target panic poses different challenges than learning good form. People have been learning and teaching good archery form since back before recorded history, and while styles may differ, the approach to teaching and learning it is fairly routine and systematic. OTOH, if you search target panic on this forum, you will find many ways of approaching the problem, some of which seem to work for some people some of the time, and not for others. It may just be a coincidence that any methods for solving target panic work at all; it is a condition that seems to come and go and whatever you were trying that seemed to work may have just coincided with the time for it to go.
However, I would encourage you to get your form checked by someone who knows what they're doing, like MoeBow. It is possible that a part of target panic is a lack of self-confidence brought on by having some unidentified form problem. This is probably just another theory that doesn't hold water, but even if it doesn't, nobody could argue for doing whatever you can to improve your form.
My experience with target panic is that if you continue to focus on shooting with good form, and don't get discouraged, it will eventually go away. Trying different things that have worked for other people can't hurt, since something that has worked for someone else might work for you as well.