I had trouble understanding what you meant in the first paragraph in your reply. I don’t know. I am not in the US and i have issues digesting the current state of things over there. Turning gaming into the hill to die on for social matters strikes me as the most insane first world problem.
About how valve is handling stuff:
I imagine Valve will have more trouble handling these complaints because it’s a business that is not just focused in one game or franchise. They are in charge of the infrastructure, they are developers, licensing, being the middle man, etc. this sets up a situation that none of the other companies you mention are facing and on top of that is the gigantic user database
these are the stats for steam in the last 48 hours: http://store.steampowered.com/stats/
That’s 11,000,000 players at any given time (edit, my bad, it fluctuates from 7,000,000 to 11,000,000 users. Still not a small amount)
From where I stand i imagine valve should be handling the following complaints: