Complex sentence: A self-described genius, billionaire playboy industrialist and philanthropist with mechanical suits of armor of his own invention, who now struggles to come to terms with his near-death experience in "The Avengers", suffering from anxiety attacks.
Split into simpler sentences: A self-described genius, billionaire, playboy, and philanthropist with mechanical suits of armor of his own invention. Stark now struggles to come to terms with his near-death experience in "The Avengers", suffering from anxiety attacks.