Complex sentence: May had a twin, April, who is revealed to have died during their childhood, leaving May permanently traumatized and empathetic to the point of being overwhelmed, her condition makes her have difficulties distinguishing others' problems from hers.
Split into simpler sentences: May had a twin, April, who is revealed to have died during their childhood, leaving May permanently traumatized and empathetic to the point of being overwhelmed. Her condition makes her have difficulties distinguishing others' problems from hers.