If you want to avoid seeing what a human being shouldn't do, I advice you that you find another book to read. The story will show you a character that you would never sympathize with even if you wanted. In fact, it would even make you hate you yourself and the world around you.
To its core theme, this book gave the best feeling of sorrow to me. I both love it and hate it at the same time. I hated the fact that I read it and I hated myself for remembering the things from it. Though, it's not all that bad I guess...