Complex sentence: According to Zipes, Andersen indulged in self pity, his egoism prevented him from experiencing a satisfying heterosexual or homosexual love, and his chronic psychological problems were the outgrowth of his inability to fulfill his sexual fantasies and erotic desires.
Split into simpler sentences: According to Zipes, Andersen's self pity and egoism prevented him from experiencing a satisfying heterosexual or homosexual love. His chronic psychological problems were the outgrowth of his inability to fulfill his sexual fantasies and erotic desires.