Nothing ever changes a fans opinion, was what was meant by it.
example.
Jerry signs a player a fan likes in FA...Jerry is great.
Another fan does not like that player, or wanted another player....Jerry sucks.
But the player he signed is decent, not great, not horrible. But does good enough. But not to the level expected. One fan for, will usually not admit it was a bad deal if other fans think it is. For the other fan, he played above expectations, but will not admit it was a good deal for his play.
Basically no one will ever be happy no matter what.