You can't expect a goalie to save everything, that's a given. What separates an elite goalie (something Ottawa has not had yet) and your average goalie, is the ability to make the save you should have. Obviously if the goal is scored because there's absolutely no defence helping you out and leaves their check wide open, then the goalie can't get all the blame. Then you get the fluke goals, which will happen to every goalie once or twice in their career - in Ottawa it seems it is every game, sometimes more than once. Then you get the goals that are pure goal scorer's goals where sometimes you cannot expect a great goalie to even make the save but the great ones will often rob the shooter.
What I've noticed is the Sens goalies over-committing to a shot, sliding way out of the crease and slow getting back into position. Laziness. The defence has also been diffuse and lost.
And lastly, not scoring is obviously hurting the team. The goalies would love the team to score and ease the pressure off them.