When the game you are complaining about has legitimate issues, it's understandable to be upset. I mean, the problems PSAS has will keep it from ever being a real competitive fighter, which was what Superbot was going for.
But with unbalanced characters, dumb playing styles, and constant glitching, there's way too much wrong with the game to not get some criticism.
I think there's still space for it to be a competitive fighter and the complaints might center around trying to achieve that. We care about that stuff as much as Superbot did.
I also think that every gaming community complains about things. I think it's just further exacerbated because this stuff does get in the way of the "consistent" enjoyment of the game and we know a little bit will go a long way of making it great.
Besides, in fighting games, people complain. It's par for the course.
I also know I have personal salt because I've been waiting for this game for a while and its success determines a second shot at this game, which we're all not sure we'll get so it's really about "fixing" the issues with this one.
I still love the crap out of this game and play it least 3 times a week for extended play periods. I definitely come back to it more than any game this generation.