Yeah, Sanji will eventually accept himself as a failure, Oda has been slowly breaking his character to that point. Sanji will officially accept Judge's ideology as superior to his mother's ideology, technology and brutality are way more powerful than kindness and willpower.
There are several foreshadowings and accumulations that reinforce that Sanji will get a transformation based on the heat of his emotions.
Queen, an evil scientist like Judge, is the perfect opportunity for Oda to reinstate Sanji's characteristics as a fighter, whose abilities are based on the heat of his emotions, defeating the evil technology used for evil
Besides, what's the point of coming to Sanji's FC, to try to hate him? Want to get attention?