Quite possibly, this is the cruelest thing that you could do to someone. Particularly when you don't understand it or only know part of the truth (at best), anyway. Let people live; let people learn. (Those are not my words but well said.
Don't get to enamored with failure. Yes, it's going to happen. Yes, it teaches you great lessons. But failure also sucks the life out of you. Find success whenever you can. Nothing succeeds like success.
One of the best feelings in life is discovering that you are appreciated by someone regardless of how unworthy someone else has made you feel. I have felt and been told I was unworthy for so long, thank you for making me feel otherwise!