Complex sentence: For example Marriott, after many years of substance abuse became quite schizophrenic at his very worst often after alcohol and drug binges and several days with no sleep, he became a violent alter-ego called Melvin the bald-headed wrestler.
Split into simpler sentences: For example Marriott, after many years of substance abuse became quite schizophrenic. At his very worst often after alcohol and drug binges and several days with no sleep, he was said to become a violent alter-ego, Melvin the bald-headed wrestler.