No, there weren't.
That team had Deron Williams and Joe Johnson at a time where both were still seen as All Star players, and Brook Lopez who was an All Star level center on the comeup. IN RETROSPECT we see all of the flaws but to act like the Nets just made some ridiculous inexplicable move at the time is simply not genuine.
And, once again, it's easy to say, looking back on it, that nobody was going to beat the Heat in the East, but it's not like they were invincible. We saw them tested by the Pacers, we saw them tested by the Celtics (with KG and Pierce) a couple of years prior. And Brooklyn was pretty competitive with Miami in the series they played against them.
The problem, like Pierce has said, Deron Williams nor Joe Johnson were really the leaders the team needed them to be. Pierce and KG thought they were coming in to be complementary pieces, but because of the personalities of the other two, the team really needed Pierce and Garnett to be the leaders, and they weren't up to that. Plus you had Jason Kidd as a rookie coach coming right out of the league himself. KG was pretty much done for, but Pierce played well in Washington even after he left Brooklyn, because they just had him play a very specific role. Brooklyn needed him to actually be a star player basically to succeed.
The move wasn't really stupid, just short sighted, and the window was INCREDIBLY small. They just threw all of their chips on the table, and didn't win the bet. shyt happens.

Unfortunately for them, because of the draft picks, they put themselves in a position where they could never make a bet again for the next half a decade.