hunting shots are difficult... dont be so hard on yourself,,
the only way to practice a hunting shot,, is to shoot a hunting shot,
you are always a bit out of position,, and dont realise it,,
so practice shooting from out of postition alot,,
dont shoot to quickly,, take your time, and you will connect,,
it just takes experiencen and practice ,,,
keep your shots close as well,, it raises the odds of success,,
one thing that really helped me,, is I raised my anchor so the tip of the arrow was on spot I wanted to hit,,
high anchor and long arrow ,, 20 yards was dead on,, I killed quite a few deer like that,,
my shorter bows would not do that,, but I had killed enough deer that I had the confidence to shoot well withi any bow by then,, sometimes no anchor at all on the short draws,,,,, that just came from lots of practice and experience,,
I will add that if you go back in your mind to the shots you missed,, you have probably not practice that shot much,,
standing squared to the target, with you feet in perfect position,, does not prepare you for a hunting shot,,
go back,, remember the shots you missed,, and practice that shot,,