I don't think the quality of Black Ops 7 itself has affected the sales a lot honestly. Of course, if the game was sensationally good, there would be a lot of hype and people will get it, but my impression is that a game being bad generally doesn't stop a game from reaching their sales targets. What you see what CoD and some other big franchises is the effect studios gradually ruining their reputation over many years by consistently releasing subpar products. They are now seeing the consequences of their extreme focus on maximizing the profit from each game, but to be completely honest, it was probably totally worth it from a financial standpoint even if upcoming games flop completely.