How is that stat calculated? Because looking at the goalies it does seem to be largely dictated by the team. For instance Nedjelovic (sp) was the 6th best goalie in that stat last year, but one of the worst this year. Freddie was the 3rd best goalie in that stat this year and quite bad last year.
Or take a look at the 2019-2020 where the 2nd and 3rd best goalies in that stat were Boston's starter and Boston's backup. Or the year before where the 3rd and 4th best goalies were NYI's starter and backup.
Tons of examples like that on that list. It's largely a team stat.
Team does play into it, because the stat assumes all shots are the same.
Personally, I think looking at the difference between xGA and GA is the best way to look at it.
Shestyerkin: +0.79/60 goals saved above expectation
Andersen: +0.5/60 goals saved above expectation
Kuemper: +0.3/60
Markstrom: +0.25/60 goals saved above expectation
Vasilevsky: +0.16/60 goals saved above expectation
Ullmark: -0.02/60
Lehner: +0.02/60
Swayman: -0.07/60
Hill: -0.38/60 (he had the best xGA/60 on the list)
Vejmelka: -0.46/60 (he had one of the worst xGA/60)
Korpisalo: -0.92/60 (he had the absolute worst xGA/60)
Comrie: +0.45/60 (by far the best numbers out of a guy who was facing bad xGA)
Now let's look at our goalies and Anaheim's:
Campbell: -0.13/60
Gibson: -0.16/60
Mrazek: -0.79/60
Stolarz: +0.14/60
Now obviously this normalizes playing time, so while Stolarz and Vasilevsky do have a similar goals saved above expectation, Vasilevsky also did so with a starter's workload, while Stolarz did it as a backup.
However, it also shows that Gibson did not just suck because he played behind a bad defense. He did worse than the defense in front of him. Carey Price, during the regular season last year, was -0.32/60. He also did crap in the regular season obviously (especially since Montreal's xGA was excellent), but in the playoffs, he was +0.43/60. Montreal's defense was mediocre by the xGA standards.
Also, this year's Bunting may very well be Eric Comrie.