You gave it your all. That's all you can do. Sometimes stuff happens. If it didn't bother you, then that would be a bad sign.
It is quite easy to become discouraged in this situation Sav. It shows you have respect for the animal. It shows you are a good man. Step back as you need to for now but I expect the cool fall breezes of next season will certainly generate that feeling to get back at it again. I was there last year myself. After much disgust with my result, I focused on improving my skills. Made the changes I could and have been very pleased with this years results.