Social media is absolutely terrible. If that got down-played or if it went away for a short while, I wouldn't cry over Tumblr, Twitter, Facebook, Instagram, etc. declining.
Web culture is alright. People get pissy here more than in the real world because the internet is a very personal thing. Seeing a disapproving comment is not the same as say, someone disagreeing with you irl. It feels more personal because those pixels will be forever placed on this magical wall you keep staring at every single day. It feels like "your" internet is insulting you, not another person.
There's this whole psychology of attachment: unlike with other forms of media, you can wilfully ignore anything that disagrees with you and create your own echo chamber. People get entrenched, and since video games are a medium based on emulating personal experience, this effect gets amplified. Hence, why people start great flame wars over game X not being liked by person Y or whatever(though that's another thing entirely, and more to do with the delusional thought process that if something you like is "bad", it reflects badly on you as a person, since you treat it as "belonging" to you. Though this is a problem with society, capitalism and namely "conspicuous consumption". Just that it gets exemplified when it comes to games).
This gets further espoused by the fact that the internet is run by nerds. Sure, there are sites exclusively populated by movie buffs, or exclusively by philosophers or what-have-you, but the dominant trend across the majority of sites is nerd-dom. This is again, another factor that further emphasises the echo-chamber effect, because the whole point of being a nerd is showing intense enthusiasm towards a specific hobby. The earliest forums and discussion boards were run primarily by the classic definition of nerds: tech buffs with interests in games, rp'ing, etc.
As a result, even with this mass designation of games, anime, fantasy etc. that is constant across the majority of the internet, each community falls into it's own niche that it is intensely dedicated to. Yes, people like games, but say, IGN has a preference for Halo, PCGamer is exclusively PC, Eurogamer is focused on Europe(as indicated in their respective titles). Like with gated communities, these niches can also become stagnant due to the lack of an exchange of ideas. It's good that sites like ours tend to mix things up a bit(as are many sites in general by this point), but there are still domineering mentalities across every single one.
Therefore, things tend to stay locked-down, so when hostilities do arise(or even contrary ideas), shit gets pretty explosive. It's this almost-unification-but-not-quite-absolute-unity that begets these sorts of events like 'recent controversies'. It's not the internet itself that does this, but the way in which people treat it and use it, same as with facebook(though that stuff is designed around vanity and breaking down human communication until everyone might as well communicate through grunts and squeaks for all the good that happens with it. Even as I might jest that I detest those sites, I see the value in them. I just don't see the value in the communities which use these sites in a manner that instead of "choose how you use this site" we now have tacit agreements as to how to "use" facebook: that pisses me off).
As for what would take for that sort of unification...I don't know. I retain hope that we will eventually link hands and complain about games instead of having some extraneous event force us into doing so. In theory, if a game was released, one that absolutely everyone likes and has played and has attached some of their own personal meaning to, perhaps we'd gain a better sense of camaraderie, but that's naive. Not only is the idea of such a game unrealistic, but due to the commercialisation of gaming ensuring that even with stuff that everyone is playing, there are massive economic barriers that would prevent this sort of coming together. Movies didn't have this problem due to standardisation: a ticket costs relatively the same throughout all cinemas, but games are not only more expensive, but also range wildly in quality and accessibility(having a dedicated games machine for example, though that is starting to slowly go away) not to mention the way that we assess a game's worth...but that's a discussion for another time.
TL

R No, web culture shouldn't die, it just needs to grow up or get shaken up by a huge, external cataclysm.