LOS ANGELES - Ellen DeGeneres used her opening monologue of the new season of her daytime talk show to address allegations of a toxic work environment, apologizing for things “that never should have happened.”"I know that I’m in a position of privilege and power and I realize that with that comes responsibility, and I take responsibility for what happens at my show,” she said in a video posted Monday.Ellen DeGeneres attends the 77th Annual Golden Globe Awards at The Beverly Hilton Hotel on Ja.