The Loomis narrative
Loomis is just arrogant. He probably always has been, but when you have Payton and his enormous ego as the face of the organization, it isn't as noticeable. With Payton gone and beta boy DA as head coach, Loomis' true colors are shining through. He knows he has the GM job as long as he wants it and is not answerable to anyone, including the fans.
That's my take at least.