I don't think your personal life has anything to do with your professional life. They are separate things. Whatever is happening at home shouldn't be carried to work. Everyone has his/her own journey. Some revel in the fact that they derive that from personal contentment, and others draw it from extreme sorrow.
All these walls that keep us from loving each other as one family or one race - racism, religion, where we grew up, whatever, class, socioeconomic - what makes us be so selfish and prideful, what keeps us from wanting to help the next man, what makes us be so focused on a personal legacy as opposed to the entire legacy of a race.
Your personal life, your professional life, and your creative life are all intertwined. I went through a few very difficult years where I felt like a failure. But it was actually really important for me to go through that. Struggle, for me, is the most inspirational thing in the world at the end of the day - as long as you treat it that way.