Everytime a soccer team, or any other team, is built around one individual, it is only ever as good as said individual. If that is done, no titles are won and no great accomplishments achieved.
I think they did pretty well, didn't they win a few big titles?
- had Pep Guardiola as coach
- players like Messi, Xavi, Iniesta
But sure, the only super star during that period was Messi...
The 2017/18 team had, in addition to Messi, Iniesta, Suarez and Alba
But again, of course it was only Messi who carried them. Sure.
But even if he did, which he did not, there are only two players like this in his generation, Ronaldo and Messi. That means the vast majority of "rockstar" emoloyees by definition cannot be in that league.