Complex sentence: He will stop at nothing to get to the top: he lies to his mother and girlfriend, Ruthie Rivkin, who try to help him become a better person, but he embezzles company funds from Apex Modes and betrays his friends and partners.
Split into simpler sentences: He will stop at nothing to get to the top: he lies to his mother and girlfriend, Ruthie Rivkin, who try to help him become a better person. But he embezzles company funds from Apex Modes and betrays his friends and partners.