A small part of it's the schedule. They've played Pittsburgh (#2 in point %), Detroit (3-way tie for 5th), SJ (3-way tie for 5th), Chicago x2 (14th), LA (0.50 in point %, tied for 15th w several other teams), Anaheim (21st) & Dallas (2-way tie for 22nd). So one more "good" team than "bad" team with 3/8 in the middle of the pack.
It's mostly Rinne IMO, who has a .906 sv% and 3,22 GAA. He started six games and has only won one of them. In the Ducks game, though, the D didn't help him at all. (Maybe others too. I've only seen a few games.) Their top four D are amazing but after that they have Irwin, Carle, Yannick Weber, and Bitetto. Irwin (who should not be playing in the NHL) is averaging 12.31 min a night, Carle 13:08.
As others have said, their forwards are struggling to score.
I think they'll turn it around at some point but if Rinne doesn't improve, they need to replace him and maybe look for some better ppl on the 3rd pair (and possibly a better 2C, though Ribeiro has 4 points in 8 games, which isn't awful).