There are 101 reasons for missing when you shoot traditional bows, and most of them are not obvious. It is a quest you are setting out on, and the best thing is to enjoy the journey, because you may never arrive at the destination.
It works like this: you get to reason #22 for missing your shot, and suddenly you discover that your thumb was pressing against the bow and this was causing you to miss to the left. You learn to relax your thumb and you are overjoyed to find that your arrows are flying straight at the target. You think, "this is such an easy game!" as arrow after arrow flies into the spot where you're looking.
Then the next day, or the day after that, you notice that you're occasionally missing high, and can't figure out why, because you're shooting exactly the same for the high misses as you are when you hit your target. Time for reason #23: you've let your focus drift to the point of the arrow, or some intermediate spot other than the spot you want to hit, causing you to miss high.
And on and on. I'm not exaggerating when I say that there are at least 101 reasons for missing the target. And I'm by no means an expert; an expert might have found 1001 for all I know.
But the reward is that if you shoot well-tuned arrows from a bow that is comfortable for you to draw, you will enjoy seeing the flight of each arrow you shoot, even if you are only up to reason #8. And there will be days when you amaze yourself with how accurately you can shoot.