... if you're in a depressed mood if you consider these things objectively rather than emotionally ...
Being objective while depressed is damn hard. Depression will find a way to play with your emotions. No matter how many effort you make.
have more positive qualities than negative ones.
Qualities are either good or bad depending on the context (like : all the best computer scientist are lazy, in the context of automating works, being lazy is a very good qualities while in every other context it is not). Being depressed will make you see your qualities based on the wrong context, always.
Don't encourage depressive people in their whining and their reasoning for their whining, you are making everything worse this way.
The term "depression" gets misused more and more every year and this has it's roots at pharmacists and doctors, telling you
"yes, you cannot be the master of yourself without *insert product/service here*".
Stop listening to them. Depression is a state of mind and self-pity will always be your biggest enemy no matter what and people earn money with this habit in other people and don't want you to be your own master and free (of dependencies on their drugs and services).
The moment I realized, that self-pity is my biggest enemy and a bigger problem than all the shit I had to endure and would ever possibly had to endure,
I made a bigger step forward in loving myself than any other person could ever have achieved in me.
Today I say to these people:
It's all your own duty and you CAN do it (I can only give advices how to achieve the state of mind you need for that).
My life mostly was badder than anyone here could imagine (I hope), so I know something about it.
Therefore: If I say "stop whining", I mean it in a constructive way and not as an attack.
It doesn't matter if all your loved ones died and you got raped every day or if you are just unhappy because your parents don't love each other,
in the end it always comes down to the way of your thinking and how you cope with things through this thinking.
Talking about problems is a great thing, but always look at the way you look at things.
Always see your "problems" simply as "circumstances".