RE: What I did wrong. long post.
Glad your pumped up for the season and it sounds like you' ve learned lots of lessons. One thing stuck out while reading your post. Lots of your problems were over aspects of shooting(whatever weapon you had). You also stated you' re now ready after shooting your rifle for a whole day. I' d shoot that thing 3, 4 maybe 5 more times(days) at least. I' d also shoot out of my stand, from the ground and with and without a rest, but shoot, shoot and shoot somemore. Just a thought!
Good Luck!!
Your preparation will make/give you your sucess!