i dont want to be presumptuous but i do believe that i know what your going through because i went through something similar.

i felt like my rage had burned away everything i didnt even know what i was angry about anymore i just felt this constant rage over all the injustices real and imagined that were done to me. i just felt hollow and burned clean except for some anger. i fealt empty it was like (what you said) i was a shell of my former self.

im sorry but i dont know if you can return to what you once where i know i didnt. but maybe you could rebuild yourself maybe focus on something new? i have been trying to let go of the hate i have had for others and for myself and focus on the future and what i can do. maybe it will be helpful for you if you try to let go of the hate or whatever happened and move on to something maybe a goal or a dream you have?