Simplify the following text for a Grade 4 native English-speaking person.
Original: After defeating the Snagglebeast , Ratchet becomes increasingly bitter and hostile towards Clank , angry that he let Qwark get the better of them . Clank urges Ratchet to continue their quest to confront Drek , but Ratchet is obsessed with getting revenge on Qwark .
Simplified: Later on , Ratchet and Clank find Qwark .