Complex sentence: By now, between the violent assault and his continued drug use, he was no longer an energetic anarchist but had become a bit disheveled and many of his friends from the punk scene no longer associated with him.
Split into simpler sentences: By now, between the violent assault and his continued drug use, he was no longer an energetic anarchist. He had become a bit disheveled, and many of his friends from the punk scene no longer associated with him.