Complex sentence: Eliot is a dependable and reliable--though thoroughly average--young man with a streak of bad luck, terminally typecast as a nice guy in a life that mimics the clichés of typical romantic comedies.
Split into simpler sentences: Eliot is a dependable and reliable--though thoroughly average--young man with a streak of bad luck. It seems that he is terminally typecast as a nice guy in a life that mimics the clichés of typical romantic comedies.