From my experience the biggest source of depression was people around me. Especially those I felt obligated to, but they didn't seem obligated to me in return.

From my experience the biggest source of depression was people around me. Especially those I felt obligated to, but they didn't seem obligated to me in return. Maybe looking here might help. Indeed, it is not uncommon to criticise the world as a substitute for those in our environment whom we cannot criticise. Leaving those people was difficult but the depression lifted and I was free to focus on my own life, which has been getting better. Also getting a good night's sleep is very helpful. There are certainly also intensifying factors in the modern western lifestyle.