Complex sentence: He says that regardless of whether Ava can actually feel or just simulate feelings, her love of Caleb has been a lie either way, and that she only pretended to like him so he'd help her escape.
Split into simpler sentences: He says that regardless of whether Ava can actually feel or just simulate feelings, her love of Caleb has been a lie either way. She only pretended to like him so he'd help her escape.