Complex sentence: Matthew Gilbert of the "Boston Globe" depreciated the chemistry between O'Loughlin and Myles as "artificial", saying that they "exchange lines of dialogue with a stilted rhythm and no natural flow".
Split into simpler sentences: Matthew Gilbert of the "Boston Globe" did not like the chemistry between O'Loughlin and Myles. He described it as "artificial", and that they "exchange lines of dialogue with a stilted rhythm and no natural flow".