Complex sentence: Kyle, unfamiliar with the show, is shocked by the behavior of the Thompson family while watching an episode and comes to believe that the societal bar has been lowered so much that no one feels shame over their actions anymore.
Split into simpler sentences: Kyle, unfamiliar with the show, watches an episode, and is shocked by the behavior of the Thompson family. He comes to believe that the societal bar has been lowered so much that no one feels shame over their actions anymore.