I think this is the real reason behind the mocking/taunting/derisive demeanour of Freddie, as instigated by master Bea, towards Lisa/David/Rodrigo.
Freddie was SO BITTER that Lisa outsmarts him and defeats him tactically in noms each week. He's been scheming, deceptive and fake; making allies for number's sake rather than true friendship, to attack Lisa. He pretends to be friendly, loving and calm; it's a facade, deep down there's a darker side.
This week it was his beloved, airy fairy, perfect, martyr-like, wonderful, pervadingly caring princess (... NOT!) that was disliked by the house and put up.
He couldn't hack it, and engrossed in doing Bea's dirty work and going along with whatever she says, he kept fighting her pathetic causes. He's lost all rationale, logic and manner about him; he will disrespect others just to appease her and get his cuddles at night.
My Vision for Friday - Bea Evicted, Lisa/David saved, Halfwit loses his evil/smug/arrogant grin, and Lisa gets the last laugh. 