Pope Leo XIV lamented the pressures young people are subjected to in the modern world during a visit to Rome's La Sapienza University on Thursday.     "We must not hide from the fact that many young people are suffering," the American pontiff said.     "Everyone experiences difficult times; some, however, may feel like they never end.     "Today, this increasingly depends on the blackmail of expectations and the pressure to perform.     "It's the pervasive lie of a distorted system that reduces