The Lightning have flat out just been the better team. Bruins can't get the puck out of the zone, and cant get production from their second and third lines.
As frustrating as almost all of these goals against Halak have been, the team is doing him no favors by not getting any sustained offensive pressure in the Lightning zone. Same shyt happened last year against the Blues. Go up 1-0 in the series and then lose game two in O.T.