Bruno should have been kicked out of the Elite Four the first time around for fielding such a beatable team. Instead it was Lorelei, probably actually the most powerful of the four, who got the boot along with Agatha. Lance couldn't have been behind that because the pairing of Lance x Lorelei is canon my fanon. But then again, the Elite Four are idiots anyway, because every time you face them, they act as if they've never seen you before, even after you've crushed them over and over.
...what is this club about again? Oh, right, Sabrina. Well, we all know she could crush all those Elites anyway, she just likes living in Saffron better.