Alex, my thanks for your gracious reply. I don't know very much about carbon and aluminum shafts, although I have used them from time to time. That said, you really have to remove the plastic vanes off your arrows and fletch them with feathers if you are going to shoot them off of your hand. No, it isnt just you! That would hurt anyone.... Most traditional archers would not shoot plastic vanes off of an arrow shelf, either. A raised arrow rest, perhaps, but not the shelf, or hand.
I have shot a lot of spruce and cedar--and I can be pretty tough on shafts, as well. I shoot a lot of ash. They are heavier, but they are much more difficult to destroy. Since your bow is very light, the earlier suggestion to try Douglas Fir is a good one. They tend to be a bit lighter than ash, and generally require less effort to keep them straight.
I noticed that you live in Germany. Have you tried a European wood like "Norway Pine"? I've had pretty good luck with that wood, and noticed it was quite popular at some 3-D shoots I attended in your country, (back when I was the "token American" member of the Sindelfingen Feldsbogen Scheutzen, many years ago).
Good luck to you. Don't get discouraged. It will all sort out. Weidmann's heil! (Bob Wilson)