Meredith was making 'bad decisions', according to Ellen Pompeo aka Meredith. The interpreter of Meredith loved playing in the medical show even if some points displeased him.
Pompeo, who wanted to devote more time to her family, does not regret her choice to leave Grey's Anatomy, of which she remains executive producer. It is by becoming executive producer of the show, after twelve years of being "only" actress, that she was able to have a real power over Meredith's choices.