I know this for a fact, from personal experience. I've gone from an overweight, angry, failure to a fit, healthy, happy, peaceful, success. It hasn't happened over night, but it has happened.
Life goes by so quickly, either we are getting better, or we are getting worse. Life is not stagnant, even if we are. So, the question is, which direction are you headed. Complaining, blaming and making excuses, puts us on the down hill slide.
Looking in the mirror, taking constructive criticism and working toward change, puts us on the path to freedom from fear, sickness, failure and hopelessness.
I am coming back from a hard fall. As I look back on it, I have to be grateful, for, if it hadn't happened, I surly could have gone the rest of my life unhappy. Today I realize I have more choice in my situations than I ever believed possible.
Fantasizing freedom to grow, learn and change.