EA doesn't know how to predict a single player game's sales figures then gets mad when their crazy high expectations are met with only a merely slightly profitable game instead of wildly. Kills the studio rather than learning from mistakes.
Meanwhile GTA 6 is one of the most anticipated games of the decade and other single player studios are thriving. Hm what is the difference, what could it be?
Odd you cited GTA6 in relation to single payer. GTA5 single player is a great experience but it's popularity and success is largely attributed to the multi player elements.
GTA 5 sold for 800 million in the first day as a single player game. The multiplayer only shipped a whole year later. GTA 5s single player was a cut above the rest at the time.
My point is that it was the highest grossing game of all time within a week and none of that was because of multiplayer. It's longevity is due to muliplayer but it was already stupidly popular before that.