THIS is the situation now, and causing Tarasenko to try to do too much himself, as he doesn't trust his teammates to score when they are open.
The other forwards, and rushing defencemen need to get up ice faster, need to drop the cycling along the walls, and get more coordinated movements driving to the net, while teammates are also breaking free moving in a cross-ways direction through the middle of the ice, to receive a pass in the slot, or on the opposite side down low, or trailing the driving puck carrier to pounce on a rebound. The Blues just don't have enough presence around the goalmouth and in the high-scoring areas, and don't have movement through these areas to draw defenders from their enclosed box, and open up some operating space in those high-scoring areas.
Tarasenko drives and has no one in a scoring area to receive the puck when defenders are drawn to him. His teammates are on the outside, along the boards, and out by the points. So, he tries to make an extra move, and loses the puck, or is forced to make a shot that is destined to be an easy save for the goaltender, or blocked by a defender, instead of getting a pass off to a teammate, in turn drawing defenders to him, so Tarasenko can be open again for a better shot or a rebound attempt.