I think Jim was a little two quick to dismiss the legitimate reasons for this anger, quickly heading off on a tangent so he could just drop an insult without really focusing on the other side of the coin.
At the end of the day the game industry is out to make money, it mindlessly plays "follow the leader" because of the people who keep liking, and liking enough to buy, very specific games and types of games. You cannot separate the players from the industry here, as they are pretty much one and the same. Basically if you hate the industry and what it's become, your generally going to hate the gamers that provided the fuel for it to turn out that way. As more and more vitriol gets aimed at the gaming industry and more people become aware of the issues, you are of course going to see attacks on the "gamer side of the problem" as opposed to the corporations themselves.
Now, in a perfect world this wouldn't be an issue, the gaming industry would create enough games of enough different types with enough frequency to keep everyone more or less happy. Sadly, this isn't a perfect world, it's a world of bloated corporate ruin, where only a scant handful of games are created at a AAA level, and tend to only be directed at the most profitable seeming, yet easy to please, group of people.
See, the vitriol aimed at something like "Dragon Age 2" came about because "Dragon Age" was supposed to be a spiritual successor to "Baldur's Gate" and the "Infinity Engine" games, basically what a semi-turn based RPG like that would look like if done with then-modern technology. It succeeded with so many people BECAUSE of that, which shouldn't surprise anyone since people still play (and remake) the infinity engine games today. Rather than sticking with the happy demographic of people they had, and providing an alternative to the "Action RPG" games already out there, Bioware basically decided "hey, we've made a ton of money, but if we turned this into a simplified action RPG we could make even more, as that is an even bigger group of people!". So basically the people who WANTED a current gen equivalent of "Baldur's Gate" got stabbed in the back, and wound up not having any games at all, where the people who liked action RPGs simply wound up with another one dumped on top of the pile of all the games like that already out there. Basically people who wanted a different kind of game, a AAA series for them, went after Bioware, but also DA2 fans because not only was the game horribly put together (reused maps, monsters spawning out of nowhere, guys in platemail ninja jumping off of rooftops etc...), but because those people represented the reason why a popular game type which is rarely touched on a AAA level was again lost, and positive responses to the game simply encourage Bioware to make more of that type of game, as opposed to more RPG-like fare.
It should be noted when it comes to "Mass Effect" that controversy was brewing for a while, the ending and marketing really destroyed the series and generated rage, but it's another case where an RPG-centric game was turned into at best an action-RPG (more of a "customizable shooter").
Understand a lot of the anger on those fronts (and the logic can be applied with different sides to other, similar conflicts) comes from a simple situation where you have a bunch of gamers who want X having absolutely nothing while those who want Y have AAA games stacked as high as the sky with more on the way. The guy who might want Y might be part of a bigger audience in absolute terms, but the guy who wants X tends to also be part of a very large audience, just not quite as big a one, enough to spark internet wide conflict which gets VERY nasty because your not dealing with any kind of a fringe minority on either side.
Ideally, the industry would produce X and Y, even if they produced more of Y, but this is not what happens, everyone chases the bigger potential profits from Y.
Don't get me wrong, it's not a good thing, and the industry is involved, but the attacks make sense, and really the closer the numbers are the worse they get.
Also there are cases where there are other issues involved beyond the game itself. See with Mass Effect 3 the ending was bad all on it's own aside from the other problems that had been brewing. It wasn't JUST about the ending but about promises Bioware made, and then revealed in a "behind the scenes app" that they never intended on keeping even when they made them. On a lot of levels it was the same kind of deception as "Aliens: Colonial Marines" albeit not as technical as no faux demos were created, rather Bioware just had people in a position to know better tell fans things, knowing they were not true, and then feign ignorance later. Those who defend Mass Effect 3 generally wind up defending what Bioware did, you cannot really separate the two here, since it's all about the end result, if you can accept the ending of Mass Effect 3, then your pretty much slapping a stamp of approval on the game industry lying directly to the fans.
When it comes to DMC, again, the issues there are beyond the game itself. It's whether you agree with the reboot and them basically creating a totally new character and saying it's the old one, or not. From someone who is a series fan before that point and does not want the changes to be maintained and the status quo restored, those speaking positively of it are effectively hurting the series as a whole... after all it becomes a situation of "what I want vs. what you want" unlike the situation with game generes this is especially nasty because there isn't even the potential for the industry to do both, since your talking about the future of an established franchise. For someone to get what they want, you cannot have what you want... so to speak.
At the end of the day it might seem stupid, and people getting worked up over games, but it makes sense, especially as gaming becomes more of a hobby than a form of casual entertainment for more people than ever before. The industry COULD change a lot of this (I mean they could for example have simply created a new action franchise with a different sensibility rather than trying to change DMC, while still producing DMC games) but at the end of the day they won't, because while they could still make money, they wouldn't be maximizing profits as ruthlessly as possible. Short of a terrorist campaign against the gaming industry conducted by psychopaths, it's not going to change, so that means people are going to take the steam out of each other on the internet.... which at the end of the day is pretty harmless.