Dujon Sterling has been one of the bright lights of Rangers’ up-and-down season. The versatile right-back, 24, moved to Ibrox in the summer despite being offered a new deal by Premier League giants Chelsea. Since then the mobile, athletic and industrious full-back has been used all across the park, popping up on both wings and in the middle of the pitch. Now, Dujon Sterling has given Rangers fans what they wanted with a more honest analysis of the home dressing room at Ibrox. Only it’s an ominous sign of complete collapse as the defender asks his teammates to show more intensity. Haven’t we se…