In Malayalam/Indian, there's a saying "Istam illatha achi thottath ellam kuttam". It literally translates to:
You find fault with anything done by a woman you don't like.
It means that if there is someone you dislike, you are eager to find their faults or flaws.
What's the equivalent expression in English?
I already know about prejudice, but I'm looking for something more than one word, some expression/idiom commonly used.