They've been smashed with injuries (Poindexter, Asik, Evans...ten separate players have started a game!) and the offense is clueless so they're just jacking up contested shots.
Also, their defense is a mess. If they bring in defenders like Perkins to take the load off Davis, that's a gaping hole in the offense. But if they bring in more offense they're basically all sieves. Or they're sieves who are shooting terrible like Babbit and Cunningham.
They were at their best at the end of last year when Evans basically became their point guard and he's out for the rest of the month. They wanted to do that again but with Holiday as a secondary point guard but mainly letting him focus more on scoring than doing both duties. Ish Smith is running their offense at least half the game and he's got a career ORtg of 92.
Asik should be back soon but he doesn't help the offense much.
Davis is trying a bit hard to show his new range too, he gets in that later career Barkley/Bosh mode where he hits just enough of them to start drifting outside and jacking them up. So then he doesn't get to the line or kill guys inside, etc. And they don't have someone like Evans slashing to the basket to take advantage of the new space as they're mostly all jump shooters.
Toney Douglas has had two decent games which might help though.