What I envy about other authors

Envy is a part of being human. I'm certainly guilty of feeling envy at times. What I don't understand, as it relates to being an author, is how some authors can become so envious of another's success that they try to sabotage that success. For example, I've heard stories of authors leaving bad reviews for other books in the same genre, books they haven't even read, just to bring down the ratings of other authors' books.

When I hear about another indie author's success, I'm happy for them. Suc...