The shooting guard was the team's top scorer during the 101-92 defeat, which leaves them second in the Pacific Division.
The 27-year-old told reporters: "We gave up so much easy stuff. We didn't bring it, no energy and we didn't do smart plays. They did not let us run our actions. They were denying our big guys. It was just hard to pass and cut."
Dragic has averaged 20.1 points per game this season.