How to help to change life?

My parents often have a negative emotions, fights, stressful jobs, sadness, bad attitudes, and other negative feelings. After many relative's funerals they see everything in black colors, very depresive.

They look much older than they should. Unfortunately they didn't have a vacation or any break at least 15years. They can't afford a car or visiting relatives. They didn't try medicine.

I feel like a failed to support them in any way. They always very worry about me.

They both have a sitting jobs and body aches. Now DAddy in bad storm in finland and i doubt that he's ok. he ignores worst conditions for work and has no time for health. I dont know how to make them smile. I cant get them gifts now. How to stop this terrible circle of bad luck, negative emotions, stress, sadness, bad attitudes, and other negative feelings?

I should find them some useful stuff? How I can change theirs and sisters lives for better?

I cant relax untill i take care of people who gave me a lot. They afraid of too many things. I cant sleep, feel myself a looser. My patience and source is limited. I dont find words when they upset again so i complain and dont know what decision i suppose to make. We very tired of a dark cloud,negative emotions, stress, sadness, bad attitudes, and other negative feelings, sacrafises? Where help can come from?How to help to change life?
Unfortunately one can only help those change who know they need to and are open to it. Otherwise it just won't work.

This is a problem those who work with addicts have.