You don't suck! You are human.If you are conscientious as far as your equipment and your practice regimen is concerned and you are disciplined enough to take shots that are ethical shots that's all you can do.The self imposed punishment for most is enough to make sure the same mistake(if in fact there was one)never occurs again.The fellow who made the negative comment I would ignore. Learn from your experience and get out there!!Good luck!I hope you shoot a monster!