You misread. Complaining is fine. The memes are whatever. It's the consistent posting in Capcom's other Twitter posts that are dumb. Like, once or twice, whatever, but it's the same thing over and over every time Capcom posts. And it's the same people.
DBF probably did impact them. But not the dude spamming the same memeing around on Twitter. That helps nobody. It's just useless negativity, and time better spent supporting DBF.
If I'm a newbie player and I see the same person posting shitposting constantly, I'm not gonna wanna join that community. And if I'm a Marvel player, and I wanna check out DBF, I'm gonna be a little turned off by how the community acts. That stuff sticks around and creates a line that doesn't really need to be there.