Rookie guard Georgia Amoore and a young Mystics team have vaulted into the WNBA's playoff picture in recent weeks. Daniel Kucin Jr./AP Photo/Daniel Kucin Jr.Rock bottom arrived for the Washington Mystics with a soundtrack of venomous F-bombs and twang-inflected jeers. It was June 6 in College Park, Georgia, late in the third quarter of a dreadful pummeling at the hands of the Atlanta Dream — a game the visitors from D.C. would go on to lose by 3…