Blizzard has lost almost 29% of its overall active playerbase in three years
I can't say what's driving all the playerbase losses but:They stopped development on Diablo 3 a long time ago. It doesn't have the staying power of more modern online games where new content is added continuously.They stopped development on HotS, which never achieved the same level of pull as League of Legends.Overwatch faces stiff competition from Valorant and other competitive small team FPSes, and also has overlapping audiences with battle royale FPSes.Starcraft 2 is basically dead. WC3 remastered flopped. The RTS genre writ large is definitely in a waning phase.IMO, when a gaming company doesn't make new games, it is going to see some losses in the playerbase. To me it's more remarkable that they've only seen this much of a dropoff.