Mike loved to indulge. He enjoyed all varieties of illicit substances. And yes, he had issues with alcohol and cigarettes as well.
Mike died a tormented and twisted soul. His legacy is quite unimpressive; a whiny voice, a grotesque moustache, track marks, a vile breath and a huge library of purile philosophy literature.
It is true that Mike despised Arnold. Many belief that his deep and bitter hatred of the great man is in part, responsible for his early and predictable death.