>The Elder Scrolls Online
Yeah, thanks for your token, micro transaction filled mediocre WoW ripoff! What could we do without you! More seriously, it is true that as it goes they're pretty good, but it's almost shittier than those bad publishers to try and profit from their reputation. You don't deserve a badge for doing what you should, and they aren't really even doing that most of the time.
Star Wars has had multiplayer for a long, long time, as soon as multiplayer tech became a thing. We don't know diddly dick about Anthem. And Halo? Multiplayer is the thing that made it become what it was, and not just a pretty cute FPS to be forgotten in less than a year after release, as its multiplayer and later co-op would shape the genre of FPS and console games overall in a way unforeseen, that becoming its legacy. If you mean the later games, Halo 5's strongest is its multiplayer so I don't know what are you on about.
You know what, or should we say, WHO ruined all those "awesome" games? Their publishers, developers, a mix of both and then, the general audience, which would create market testing to inform the former's actions. It's admittedly pretty cute to honestly believe that single player games are a rarity even in the AAA or even "AA" scene, and that all the issues with some projects can be blamed on a single playable aspect.