I'd suggest that the criticism I've seen toward Velma is in proportion to the amount of promotion that was behind the show. It's been promoted ad nauseum for weeks now, so of course it had a big target on its back. As for the other three shows you mentioned, I have personally never seen anyone talk—positively or negatively—about two, and I can recall having seen exactly one person talk about Brickleberry. And to be honest, I'm not sure that wasn't Big Mouth.