Complex sentence: A former kickboxer who had to deal with being bullied, he dropped out of high school and has been afraid of leaving the house because it would put his family in danger, and often hunches in his room wearing a sweatshirt and pants.
Split into simpler sentences: A former kickboxer who had to deal with being bullied, he dropped out of high school and has been afraid of leaving the house because it would put his family in danger. He often hunches in his room wearing a sweatshirt and pants.