A new target that I made due to bounce back directly at my face from 3 meters

This is a followup video from one that I posted earlier regarding a very near miss due to a bounceback to the face, I might be 73, but I just got this target round 2 days ago, and watched them cut it. You will see it in pieces at the end of the video, I destroyed it with a sledge hammer. How and why did it happen I can answer it very easily, I saw what I considered potential problem areas, and I painted the visible ones, so I knew where they were. Who is to blame, I am because I was chasing a goal, the Level 1 nospin Diploma. I have had to teach myself everything for 4 yr. I created my own journey to develop my own technique, and design make a knife to fit me7 work with my style. That is a greater accomplishment to me than a diploma, because most do not make their own knives, you do not get any credit for that. I have been thinking about everything that has happened, I probably threw over 1000 knives, so I decided to design and build my own target with wood that I picked out to meet my criteria.