By Tzvi Machlin Once considered one of the best track runners since the late-great Florence Griffith Joyner, Sha’Carri Richardson has had a brutal couple of years in the 100-meter dash. On Thursday, Richardson finished 5th in her heat before the semifinals of the USA Championships for the 100-meter dash. As a result, she failed to qualify for the USA semifinals or the upcoming World Championships. Richardson was in no mood to talk to the media afterwards. Video shows her jogging past reporters. But it hasn’t been all bad for Richardson. Just over a week ago she won the 200-meter dash with a ti…