To be honest, there's two sides of the argument.
Banton and the rest dropped absolute sitters, had those catches been taken, QG would have felt like they were in the game.
Because bowlers had catches dropped, they also lost some confidence, but a captain yelling at them is also not a good sign.
Someone like Shinwari is not a death bowler, it's been established already. Sarfaraz is giving Shinwari the wrong role, and then getting mad at the results.
Bowl Shinwari in the middle overs and complete his spell before the death.
Part of the blame falls on Sarfaraz, because clearly, some of the bowling plans he decided for the bowlers did not work at all.
He needs to use his resources and calm down in his approach. Shinwari bowled two excellent overs up front, but I have no idea why he's called to bowl in the death when he's clearly a middle-overs bowler.