lifesahack

Depression is a negative thought loop that in the moment feels impossible to escape. Irrational thoughts seem rational. In a clinical sense depression (as a disorder) may be the cause. It persists even when your quality of life is good. That said, depression can also be an effect (triggered by a traumatic experience).

Distancing yourself from your feelings may help temporarily, drugs do that.

Occupying your mind with activities that provide a positive reward loop and positive feeling (hobbies, exercise, social activities) likely makes the most difference.

Depression gives you a negative outlook, regardless of how good your quality of life is. An irrational thought loop that whispers to you (or screams at you) that things will not get better. It's easy to conflate negative thoughts into reality.

If you do find a way out, the idea that life itself is sacred (regardless of quality of life) can help keep things in perspective for next time.