Demons never complained about waiting. First, waiting was easy when you were eternal and didn’t need to breathe. Second, complaining was a good way to get yourself tortured for a few centuries. Hell wasn’t big on bitching.
For those looking for good portrayals of depression (and other disabilities) in YA, check out Disability in Kidlit. All their reviews are written by people who share the disability in the book! Here are some books about depression without white boy protags they've reviewed positively: WHEN REASON BREAKS by Cindy L. Rodriguez, THIS IS NOT A TEST by Courtney Summers, and RAGE by Jackie Morse Kessler.