after watching the first episode I had nighmares, I was so disgusted by the main character (which, btw, proves the genius of Cumberbatch's hyperrealistic performance)... but at the same time I was touched by his trauma, sympathetic and in a way fascinated.
anyway I had to force myself to continue watching.
it was worth it, all the pain he had suffered was unveiled in the story of his childhood in the 2d episode... and further on.