Why does my Screen glitch

I'd suspect the Uconnect system or its power supply before blaming the reverse camera itself. If the screen is glitching so badly that the camera disappears too, the head unit may be freezing or losing power/communication. I'd check the battery voltage, grounds, and connectors first, then look at Uconnect software issues for that specific Renegade. I wouldn't replace the screen until those basics are checked.