I'm not sure I understand what your argument is here. Are you arguing that Shero isn't a good GM? If so, yeah, he's been fired twice because of that. He made a lot of trades that were on the surface good value for us, but he was constantly making a rebuild move on one side and a move to contend on the other. If he had committed fully to the rebuild, we would have bottomed out faster and then we might be contending sooner. Who knows, it depends on how the picks he would have made or prospects he would have traded for would have worked out. Are you saying we all should have been more down on Shero sooner and calling for him to be fired? You're asking a lot of fans of a team to root against moves that are on the surface making the team better when fans always want to believe their team has the potential to be successful. Something tells me if Shero had just made 2nd round picks instead of trading those off for Palmieri, Mueller, Gusev, and traded off Schneider, traded Larsson and Henrique for picks/prospects instead of Hall and Vatanen, that you wouldn't have been happy with that either.
Are you arguing that we should be better given we drafted 1st twice? If so, yeah, we got unlucky that in 2017 the two prospects in consideration to go 1st were underwhelming compared to most of the other recent high picks and that in 2019 the consensus #1 was the least "NHL ready" in a very long time. You've been arguing that somehow having multiple high picks should have just instantly made us a good team for a while now despite that clearly not being how it works for almost any franchise. If you're holding this against Shero, you're essentially blaming him for winning the lottery in the wrong years.
But if you're arguing that the franchise was in a better position pre-Shero than post based on win%, you're placing way too much emphasis on the win% of the NHL roster and not enough on all the other assets and how they project.
Not to mention, none of this matters at this point. Our D prospect pool is absolutely loaded, we have a number of good young forwards pushing for roster spots, we have two first-line caliber centers, several additions from winning pedigrees to the roster, and the best overall defense we've had since I started following this team (and that includes the group that went to the cup finals).
I also can't explain to you how absolutely meaningless the difference between 32 and 31 wins is from a statistical standpoint in a game as high-variance as ice hockey, so asserting that the NHL roster even was worse in 2019 vs. 2015 based on that is quite the statement to make.