No, those stats aren’t related to team. They are isolated metrics from a regression model that accounts for teammates. You can argue that they don’t always accurately account for certain team dynamics and I wouldn’t entirely disagree with that but they are supposed to be isolated.
And while the Sharks are a tire fire this year, they were very good in terms of CF% and xGF% over the past 3 years, where Couture was still mediocre from the ages of 26 through 30.
Not that points and plus minus are exactly good stats, but they are showing decline as well. Since the 2017-2018 season, he’s 56th in points per game and a -7. In the 3 years before that, he was 48th in points per game and a +7. Again, I want to emphasize that I don’t care for plus/minus or raw point totals, but you are totally wrong that he hasn’t declined in those areas. Most of all, his 5-on-5 shot rate is in major decline. In 2013-2014, he peaked at 16.92 shot attempts per 60 minutes at 5-on-5. His shot volume has declined in every single season since then and was 12.23 last season. This season, he’s at 9.8. That is a major decline. Even if you look at just raw shots on goal per game, he’s clearly in decline. He was above 3 shots per game in each of his first 6 full seasons in the league and peaked at 3.58 shots per game in 2013-2014. Now, he’s in steady decline, just below 2.5 shots per game this season, and he was just above 2.5 in each of the past 2 seasons.
You should probably fact check before you post because you got pretty much all of your facts mixed up. The only one you got right is that his shooting percentage hasn’t declined. And while Couture is a great shooter who has had awesome shooting results over the past few seasons, shooting can be influenced pretty heavily by luck, and in Couture’s case I think some favorable shooting luck is actually masking a major dive in effectiveness. He’s not the same player that he once was and he’s very likely to continue declining as he ages, just as almost every player does when they hit their 30s. Sharks fans got spoiled by Burns, Pavelski, and arguably Thornton having career years in their 30s and that was fun but that doesn’t mean that aging curves suddenly don’t exist. They still do and Couture’s isn’t going to be pretty. And Burns has been bad for 2 of 3 years after signing his contract now so it’s not as if he’s immune to decline either.