HOUSTON — The game turned for the Tigers on a misplay in left field in the second inning. But the primary villain in their 3-2 loss to the Astros at Minute Maid Park Friday night — and the source of lingering frustration — was a scuffling, impotent offense. “It’s frustrating when you don’t win games,” right fielder Robbie Grossman said. “You show up to the park expecting to win every day and when it doesn’t go your way you have to come together and grind some out.” Astros right-hander Luis Garcia allowed just one earned run and two hits through seven innings. From the third inning through th…