You said poor loser, not whether one conceded or not. She has had excuse after excuse, she blamed Sanders, the Obamas, racism, sexism, self hating women, the media, uninformed voters, Russia, the DNC, her campaign staff, campaign finance reform, Jill Stein, the Electoral College, Comey, and Wiener. There is no one she hasn't blamed other than herself for her loss. She is a definition of a poor loser, not as bad as Trump, obviously, but a poor loser none the less. She blamed her own party and her own campaign staff, that is pretty low.