I walked away from "Elle: A Modern Cinderella Tale" feeling quite let down. It seems like Sterling Knight made choices early on that didn't do him any favors; he ended up in roles that seemed to hold him back and stopped him from reaching his full potential as an actor. The actress playing “CinderELLa” just wasn’t good, and it really made watching the film a chore. She didn’t seem to have what it takes, and her si…