You will never truly understand the struggles of another person. Remember to realize how hard your own struggles are for you. The other guy feels the same way. We are all trying to make our way in this world so make it easy on everyone and don't judge.
Just remember that sometimes the way you think about a person isn't the way they actually are. --John Green (This is the hardest and truest thing I have come to learn. Have to remind myself of it always.
Let people do what they nned to do to make themselves happy, mind your own business, and do what you need to do to make yourself happy. Why is this so hard for some people? Isn't that what we all want? To be happy?
I'm only responsible for what I say, not for what you understand. Although as an author I am responsible for making readers understand--a reader who doesn't understand is an unhappy reader. (And there is some value to leaving some questions unanswered.