As with most things in life, it's hard to pin down an exact singular reason for the downfall of Destiny 2, which had previously been one of the most enduring online first-person shooters in the genre, but Epic Games CEO Tim Sweeney has seemingly floated what he thinks was a major issue: Bungie and Sony not embracing generative AI enough.
For a player and journalist's perspective, I'll defer to GamesRadar+'s Austin Wood, who cites "unpopular systemic changes, wobbling epilogue narratives, and a severe content drought" as some of Destiny 2's biggest pain points in recent months, and of course Bungie seems to have put all of its eggs into one basket with Marathon, diverting resources that would've otherwise gone into making new Destiny 2 content. But behind closed doors there were other factors at play, according to an anonymous source familiar with the situation speaking to Forbes.