There are many factors to consider when looking for 'aang depressed fanfiction'. One approach could be to think about what might cause Aang to be depressed in the context of the Avatar universe. Maybe it could be related to his struggle with being the Avatar, his losses, or his relationships. Once you have a clearer idea, you can look for fanfictions that explore these themes. Additionally, you can follow some well - known Avatar fanfiction authors on social media platforms, as they may have written or be aware of such stories.
Well, finding 'aang depressed fanfiction' might be a bit of a hunt. You could also check out some Avatar - The Last Airbender fan communities on platforms like Reddit. Sometimes fans will share and discuss interesting fanfictions there. They might be able to point you in the right direction for ones that deal with Aang in a more depressed state. Just be sure to follow the community rules when asking for recommendations.
I'm not sure about specific 'Aang depressed fanfiction' offhand. You could try searching on fanfiction websites like Archive of Our Own. They usually have a large collection of Avatar - The Last Airbender fanfictions, and you might be able to find ones related to Aang being depressed by using relevant search terms.