Pope Francis is correct: contemporary culture has a difficulty with ethics. I’m less convinced it’s a generational thing. The human inclination has always been to avoid ethics. Leaders in previous generations had their blind spots, too. We’ve always had poor examples of leaders.
272. Ethical formation is at times frowned upon, due to experiences of neglect, disappointment, lack of affection or poor models of parenting. Ethical values are associated with negative images of parental figures or the shortcomings of adults. For this reason, adolescents should be helped to draw analogies: to appreciate that values are best embodied in a few exemplary persons, but also realized imperfectly and to different degrees in others. At the same time, since their hesitation can be tied to bad experiences, they need help in the process of inner healing and in this way to grow in the ability to understand and live in peace with others and the larger community.
For your reference, remember that Amoris Laetitia is online here.