First question: Because I don't damn care. I made it my life to work for and protect humanity, and it was them whose fault is that I became immortal, and an abomination. I then watched as thousands of people continued to come down here century after century, and they would always get killed by possessed ghouls, by walking skeletons; they would enter and die, but in the rare cases that I got the chance to speak to them they would see me as another monster.
I became detached from my past human self, and my humanity; after that, my hatred grew with every hair that fell off my head, fossilized.
...Second question: probably in some meta, non-canon computer desktop, and thanks to some help from the mechanic. Probably.