There are others who have fallen from higher grounds, don't be too hard on yourself...
Just like playing some video games, you play the game very well, accumalated a lot of powers, etc. Then suddenly kena kill, come out without all the powers, start all over again...
The point is don't give up, use your experience to recover and regain all the things you used to have, might take some time, but at least you are not sinking deeper and further from your original goal...
Cheers!