Vultures are always great fodder for a darkness theme. Yours is an exceptionally high quality image and should finish high in the scoring. Clarity and technical quality is far, far above average. Composition is excellent.
There will probably be some voters that think you are shoehorning this image into this challenge and it is really an outtake from your birds entry. That would be too bad but some folks surely will think like that. You should not be surprised.
The only minor technical flaw is that it appears to be overly smoothed in the lower chest and lower wing of the bird. This could be from noise reduction being aplied but it is not bad.
That's a great photo! You've met the challenge and captured a dark subject with a dark background with beautiful lighting and great colors. Plus, you surmounted the obstacle of creating a lovely portrait of a really ugly bird. Good job.
Uh, I don't understand your title. To me the title suggests an internal stuggle, but there's nothing in the picture that would suggest this. The only link to the challenge I can see is the low key. 5.