Snitches and Dobbers…How to deal with people who can’t deal with confrontation

Snitches" and "Dobbers"…How to deal with people who can’t deal with confrontation? Why have humans become “screen/internet/social media bullies” instead of dealing directly with the person they have a challenge with? Why do we whine to people who cannot fix our challenge/problem? How to be a leader with integrity and courage to face the person you have a challenge with?