"There's no consistency in our game," Tarasenko told reporters postgame. "I apologize to all of our fans. We can't play at home like this, and ... it's unacceptable. I don't know how to fix it. We'll work on it, but (it's not working) for now."
"We need to use chances like that, especially (at) the start of the game," Tarasenko said. "It's supposed to give our team (an) emotional bump, and we need to get on the scoreboard if we have a four minutes of power-play (time). We didn't do our job over there (Sunday) and this is (the) result."
Vancouver opened the scoring on a Brock Boeser shot that ricocheted off the glass and bounced in off St. Louis goaltender Jake Allen's pad. Boeser finished with a hat trick and Elias Pettersson collected five points in the Canucks' victory.
The Blues shut out the Winnipeg Jets on Friday.