I don't really care about the scandals, but man, Blizzard games have been shit for a long, long time. Gone are the days of Diablo 2 and Warcraft 3.
Starcraft 2: The age of Blizzard RTS is over now, but it was the best RTS ever made and the devs left a final patch with a massively expanded community tooling.
Overwatch: Was absurdly successful and then decided to shoot themselves in the foot canning development, but the weakness there was hardly the game itself.
Hearthstone: I do not respect the design choices the game makes, but I admit it's practically defined Digital Card Games as a genre ever since it's come out.
World of Warcraft: Questionable storytelling aside, I've only heard good things about this from my MMO playing friends. I have never had the time to play an MMO myself, but I'll defer to them on this.
(I guess that they are stuck in a bad place with their games being so popular that they attract a lot of unwelcome attention, but IMHO still not worth it for a game that is much more cooperative than competitive.)
I don't see issues with online only tbh.
And last I checked they seem to have given up on supporting Diablo 1, and let GoG deal with it instead ? (Its online MP has security flaws.)
And Blizzard cannot run a game if Blizzard doesn't exist.
But even before that happens, you can already see the wasted potential : D3 (and D4) has no modding whatsoever, compare with D2R (though mods there are still heavily restricted and they have also removed normal MP from it) and especially D2LoD legacy !