Riven Is a noob trap
Riven is an awful champion because she loses to tanks, ranged champions and those champions who have cc. She is a weak teamfighter because cc destroys her, she is squishy and she can easily be kited. Champions like janna can totally negate her and she isn't the splitpushing monster jax or irelia are. She gets outscaled and is a very hit or miss, inconsistent early game. Stop playing riven in ranked, it's unfair to your teammates and frankly quite dumb. That said, Riven might be able to be fixed if her Q and passive can crit for 1.75x damage much like yasuo Q.