"Disappointed fans" refers to people who are let down or unhappy because something they were hoping for or expecting did not meet their expectations. Full definition
The latest entry does not disappoint fans of the series and genre. (leveldowngames.com)
Despite the alterations, the adaptation will certainly not disappoint fans of the book. (totalpolitics.com)
It will also satisfy a large section of disappointed fans who never got the chance to play Destiny on their PCs and thus missed out on the experience. (popgeeks.net)