Complex sentence: Harry 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, embezzles company funds and betrays his friends and partners.
Split into simpler sentences: Harry 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 and betrays his friends and partners.