“ when an archer misses the mark, he turns and looks for the fault within himself. Failure to hit the bullseye is never the fault of the target to improve your aim, improve yourself.

Don't blame anyone for your bad decisions. Its no ones fault but yours. If your grades are not what you expected them to be don't blame your teacher for that.  You're responsible for all your actions , if you don't do your work don't expect get credit for it .