That sv% is definitely atrocious, but it doesn't tell the whole tale. Brodie was easily the Flames worst player.
I agree that Smith had some certain measure of responsibility on the Vanek and shorthanded goals, but can't blame him all that much for the other three, as they were just really unfortunate bounces.
Canucks Goal #1 is on Brodie. It looks like Dougie's fault at first but he was trying to defend both the shot and the pass at the same time because Brodie completely abandoned his mark to attempt to retrieve his stick. At least Brouwer recognizes that defending the man is more important than picking his stick up, but Brodie does not, and that is his job! And because of that, Dougie is left practically defending a 2 on 1 close to our net.
Canucks Goal #2 though is 100% on Smith. You can see him cheating a bit on the shot if you look closely at his leg positioning. He is very clearly anticipating a push-off to the right. This is in expectation of both Boeser and Horvat being dangerous options for Vanek as a pass, pictured below. However, his job is supposed to play the shot and trust his defencemen to make the pass, and he made a bad read here. I think Vanek may have been thinking fake shot to pass, but saw the gaping opening that Smith gave him. If I can see it... he can.
The shorty has already been discussed ad nauseum - I blame Brodie and Smith equally.
The 4th goal is kind of on Dougie and Backs - but it was just mostly a bad bounce. I think Dougie was making the right play because there were two Canuck threats, so he had to play the passing lane and not the man.
5th goal was Brouwer being braindead and not covering for a pinching Kulak (and Bart for not knowing how to defend a 2 on 1).