Complex sentence: Hades has difficulty appreciating and expressing his own values, even if he tries to flatter occasionally, even going so far as refusing to believe it was possible for a Lasso-ensnared Diana to be capable of loving everyone, including him.
Split into simpler sentences: Hades has difficulty appreciating and expressing his own values, even if he tries to flatter occasionally. This includes going so far as refusing to believe it is possible for a Lasso-ensnared Diana to be capable of loving everyone, including him.