Coming into the game today, they were 10th in MLB (6th in NL) in runs scored per game and 10th in MLB (5th in NL) in runs against per game. Not great in either respect, but also hardly bad, and the combination of the two should result in a winning record over the long term if they keep up the rate.
No one has started off too horribly with the bat except for Rizzo who's on the DL.
The starting pitching has been inconsistent. One good start, one bad start, but the bullpen has been lights out.
They're batting a ridiculously unsustainable .193 with RISP (27th in MLB, 14th in NL) versus .242 overall (8th in MLB, 3rd in NL). That will even out over time. They were .255 overall and .253 with RISP last year.
My conclusion: Small sample size bad luck that will sort itself out over time.