At one point is the TEAM just not as talented as people believe? Yes, it has individual talents who can score goals and make plays, but it doesn't mesh, so it doesn't matter.
This is a confusing mess so I'm going to start with some basic definitions.
A collection of individual talents
is a talented team. Adding up goals scored is a proxy for this.
A talented team is not necessarily
a good team.
There are plenty of reasons why a talented team might not be a good team.
1. Lack of chemistry.
2. Lack of effort.
3. Lack of confidence.
4. Poor coaching.
etc...
You can't prove that a team isn't talented just using the fact that it isn't good. You need something more than that.
And a few months of not being a good team doesn't make stronger proof that a team isn't a talented team. The 2003-2004 Colorado Avalanche had a year with Sakic, Forsberg, Selanne, Kariya, Blake, Hejduk, and Tanguay. They didn't click. It was one of the most talented teams the league has ever seen, but it wasn't that good of a team. They were always less than the sum of their parts.