I understand your point of view. My stutter was caused by a traumatic dog attack at the age of 5. I did blame the dog in my teen years but all that anger only yielded ulcers and migraines. I never forgave that dog but I did move on knowing that my life would be fundamentally different from here on out. The point that I trying to make is focus on therapies that help you improve your fluency. Anger will only be a detriment if it's not re-directed into a more constructive and positive direction.