In my experience depression that is brought on by social factors results in you projecting a lot of negative things that you were pushed into believing. There's usually a lot of "programming" that needs to be removed before you start to feel better. Usually bad experiences will cause us to create negative outlooks about ourselves and these outlooks lead to bad habits. So in the beginning you just feel negatively about everything. But soon that can lead to other seemingly unrelated bad things randomly happening.

That's why they tell kids not to watch violent tv. They can misinterpret it in so many negative ways and that can lead to all sorts of negative emotions and behaviors. Adults are the same but it takes a bit more for it to occur.

A big thing for me was thinking about why I felt the way I did about some things. I ended up realizing that I believed in a lot of things because I was told they were true instead of actually thinking about them for myself.