We should also take into account that Bob is PAID to support his team. If Vicki's unpopularity (her fault) ends up being an excuse for her to take on old eating and other such habits, it's his job to keep her focused and thin... he has to support her.
Everything said too, we haven't seen the good side of Vicki. She's probably not always nasty, it's just that's ALL we get to see. If we were to see her being, if not nice, at least tolerable, then maybe we wouldn't hate her as much? Which would explain why she actually got someone to marry her. And also why she is still living.