By Matt Hladik There were many prognosticators who felt the Brooklyn Nets would have a highly competitive playoff series against the Boston Celtics. Some analysts even projected Brooklyn to advance. Through three games, those predictions look foolish. The Celtics are up 3-0 in the series, and even though all three wins have been by single digits, with one coming at the buzzer, they have clearly been the better team. Additionally, Boston has totally shut down Nets star Kevin Durant, holding him to 19-of-52 shooting so far. Kyrie Irving is also just 10-for-30 from the field in the last two games…