On Saturday, in the heat of battle, LaLiga’s second-youngest manager — who played no professional football and has no trophies to his name — yelled at Atlético Madrid coach Diego Simeone, who has made 1,500 professional appearances as a player and coach, won 21 trophies, and is a four-time LaLiga manager of the year. The younger coach made “crybaby” gestures and insulted the feisty Argentine about his “whining” to referees.…