Quarterback Dak Prescott showed his frustration Sunday as the Dallas Cowboys continued their descent down the NFL standings. Prescott sat out the entire fourth quarter of an eventual 27-21 loss to the Atlanta Falcons due to a hamstring injury. As he sat on the sideline and watched the seconds tick off the clock to seal his team’s fate, Prescott was captured venting out loud. Although we can’t know for certain exactly what he said, reading his lips gives a pretty good guess. CLICK HERE to go to PrizePicks and use code ON3 to receive a guaranteed $50 once you play $5 in lineups! “We f****** suck…