How unfortunate. I to know how you feel. This has happened to me.[
] What I did was I decided not to wait and pick up my bow 2 weeks before the season. I now start shooting in March or April. I used to be satisfied with hitting the pie plate (9 inches) and thought that would be “good enough”. No more. Now at 40 yards I can get those 4 to 5 inch group pretty regular. That said I will limit my shooting at deer to 30 yards.
This is what worked for me and it may or may not work for you. I am in no way saying you are a bad shot. I just feel that for some the more you practice the better you will get. Mistakes will still happen. That small twig that you don’t see that deflects the arrow ever so slightly. That I thought it was 23 yards and it was 29. All anyone can do is their best. Nobody is perfect. Keep your chin up and good luck next time.