I'm of two minds.
On one hand, I think representation matters and that people should be able to play as characters they identify with or someone they can latch on to. Video games are very powerful medium regarding that. I play fighting games, and the amount of diversity in that genre is kind of unparalleled in my experience. I think it's really cool you can choose to play about any race under the sun, lgbt people. Guilty Gear has a black man who is gay and in love with another man. I think stuff that like matters towards equalizing software so that it shows a more equal approximation of life so that people of different backgrounds can find appeal in them. I also find certain types of "causes" (if I could call them that) in the industry, such as being against over sexualization of female characters, to be pretty worth fighting for.
On the other hand, I think people can take it too hard sometimes. These things I described above are pretty important, but it feels as if many people who fight for games to be inclusive sometimes go out of their way to demean something. I think Dragon's Crown is a good example. At the time of release there was lots of uproar about how it was demeaning to women. It's okay for people to express these beliefs, because it's everyone's right to hold their own opinions.
But it becomes a problem when you start insulting the artist, for example, in a professionally published article, labeling them as "a fourteen year old". Don't get me wrong. Left leaning gamer's aren't the only ones prone to this.
There was the infamous DOAX3 situation where thousands screamed censorship because the title wasn't being released in western territories.
Or when it was announced the main character of GTA: San Andreas was going to be black. The same mess happened again with Mafia 3.
If a game offends people - whether because a character is black or because one of the female characters huge breasts - it feels like people go out of control with it. That's not to say these are remotely on par with each other, seen as being mad about a character being black is cold cut racism, but it reaches a point where the signal to noise ratio just gets out of whack. Where people who, at one point decried the very real problem of over sexualization of female game characters, now have a problem
any time they see a video game character with big breasts - as if the mere idea of any sexualization period is enough to offend. And now any time Nintendo deems something inappropriate such as sexualizing a 12 year old female character so they scale her down to be more appropriate there's a whole legion of people screaming CENSORSHIP because they didn't get another character for their wank bank. Even if the causes are legit, sometimes it's hard to give a fuck and you just want to play video games.
I hope I've articulated myself well here as it's for me to do so regarding this subject. But, I'll try again: I get wanting the social justice in video games and making it important. But it gets to a point where it feels like people care more about the identity aspects and less about the actual game, to which is starts to feel more of an agenda rather than out of a place of love or care for the hobby.
RE: Social justice warrior, I admit that I use the word. I have found a specific type of person that I think fits the description of it. I know people among all political allegiances who use it. I don't think social justice warrior is the best way of saying it but it's the description for what we've got currently when observing a specific type of person's mannerisms and behaviors. I was told it was only the alt-right who use it, but my liberal and fellow leftist friends also use it.