From everything I am reading, Frankie had an extremely difficult time with the comp and it was anything but an easy win. And as others have pointed out, this isn't the first time one person won it for the team. Of course, even if his team lost, there was still the POV and whole week to turn things around. Sorry, I am just not seeing any mass conspiracy here, especially considering Arianna's fanbase is comprised of children and Frankie is not a fan favourite.