I actually had a look at his numbers a week or two ago because people were shitting on him. His really bad season was 2017-18, but 2018-2019 (at .918) was actually really solid in context. I also like to point out that he played 66 games, and the next goalie with a .918 SV% when ordered by game played is Pekka Rinne with 56 (HM Andersen with .917 at 60 games, he's got a lot of unwarranted hate too). Also most TOI in the league, 3rd most shot against.
And 0.918 was also 12th in the league for goalies with more than 40 games played (which I consider starters).
From the games I saw, 2019-2020 he was really good, but the defense let so many quality chances that there was no way to have good stats. Utilization-wise it was a similar story (most TOI by a wide margin, most GP, 2nd most shot against). Compare his numbers to his backups and there's really no better context.
Bottom line is that he still played great hockey in general, but unlike a star forward goalie stats are not additive, so it's gonna be a lot tougher to look good on a bad team without seeing him play first-hand.