I think the thing that confuses me the most is, if you're someone who likes SFV and plays it all the time, what difference does it make to you what anyone else thinks? Why do you care if other people think the game is a garbage fire? How does some unknown internet person's opinion about the game affect how much fun you are having with it?
I think they care about what other people think because they don't want the game to be so unpopular that we have to do 10 years without a new street fighter once they're done updating SF5 like what happened after the SF3 series bombed. If the competitive community was big enough to support high games sales on it's own they wouldn't care as much about what casual players think, but it's no where near big enough for that.