Why is life easy for some while others are hard?

Life is easier for people who have better perspective than others.

Perspective comes from a lot of different aspects the family you were brought up in, the friends you've had, books you've read, the content you consume etc.

Questions you ask yourself matters as well. And even the way you talk to yourself.

Do you keep victimizing yourself? Or do you have the ability to look at situations objectively?

A combination of a lot of these things usually make life easy for some people and hard for others.