Complex sentence: After the machinations by Mysterio are disclosed, Foggy is set free, but he feels so bad about having failed Liz, that he doesn't have the heart to even attempt resuming the relationship.
Split into simpler sentences: After the machinations by Mysterio are disclosed, and Foggy is set free. However, he feels so bad about having failed Liz, that he doesn't have the heart to even attempt resuming the relationship.