Dark, gritty, brooding ... excellent. If you want a quibble ... here's one: the arrangement texture seems, at least to my ears, to be too similar, throughout ... you may, perhaps, want to pare it down a little at the beginning, so that it really strikes in the end section, when you go up in register with your voice. But this is based on a first listen, so I may be talking nonsense

I'll listen again, and amend my feedback if I change my mind! Otherwise, an excellent song.