No, she didn't. She was a one-dimensional singer who put up two bad weeks in a row. She left when she earned her ticket out. It's just unfortunate that it doesn't always work like that and that people over-staying their ability (Covais, Pickler, etc.) sometimes manage to hang on for weeks for reasons other than their talent.
One dimensional? Explain that. She nailed the Heart song as well as Chaka Khan's I'm Every Woman. Few other great performances as well. Her bad performances were not even all that bad and especially so when compared to Kat.