I'm also a gamer with depression (which has been getting better lately, but it's still there, the underlying chemistry still prevents me from being "normal," whatever that means). I think I see what you're talking about but I tend to go for a different approach, more of a "I will use the techniques I use to force a positive outlook in myself, and apply them here," where I tend to focus more on playing roles like jungle and support and trying to set up kills and keep my teammates happy--I may not have a positive view of myself but that doesn't mean I can't have a positive view of others and encourage them to have a positive view, and give them the best possible chance of success.