There were no excuses used, no cursing the divine inside another crestfallen locker room. There was nothing but unadulterated accountability from an Islanders team that is so close to falling off the competitive cliff, they can smell decomposition below them. “What did they tell you?” was how coach Jack Capuano opened his press conference after another third-period collapse, this one ending in a 5-2 loss to the Canadiens at the Coliseum. “It’s battle level,” Capuano began explaining, with his team still three points out of the final playoff spot with 18 games remaining. “That’s the name of the game. It has nothing to do with structure, it has nothing to do with systems, it has nothing to do with anything else. At this time of year, the teams that out-will the opponent will win the game.” So, coach, do you have the guys in that locker room that can do that? “Well you hope you do,” Capuano said, “but this is time and time again now that it’s happened.” On Tuesday against the Senators, the Islanders (13-14-3) went into the third period with a 3-1 lead. They lost 5-3. Last night, they went into the third period tied 2-2 with the Canadiens (20-5-5), who are the Eastern Conference’s second-place team. Just 48 seconds in, Montreal captain Brian Gionta tipped one home, followed 10 minutes later by a P.K. Subban shot getting deflected in, and 33 seconds after that, Brendan Gallagher finishing a breakaway off the post for the clincher.