Who am I?

I am, Erwin C_____ S_______, a person who fought for what was right:
honor, justice, friends, family...
I defended the weak from greater evils.
I was there for others when they needed help,
but who is there for me?
I engage in battle everyday against my greatest foe...
myself.
I confront what has hurt me for years:
depression, low self-esteem, loneliness, suicide...
I have turned to those that I have aided,
but they turn their backs on me.
I, yet again, ponder who is there for me?
I strove to achieve my personal best,
but I can see that my best isn't good enough.
I am capable of so much more
because my past has proven it.
I was a good student,
but now, who am I?
I fear that my evils are winning this war over me,
and I ask, again, who am I?
Am I still Erwin C_____ S_______?
No, because now...
I am nothing.