C2 找…的茬,挑…的毛病
to criticize someone or something, especially without good reasons
  He's always finding fault with my work. 他总是挑我工作上的毛病。 
 She's a nightmare to have as a guest - she finds fault with everything.
 An internal audit found fault with procedures for awarding contracts.
 It's not just you - she finds fault with everyone.
 It is impossible to find fault with Tierney, the way he is playing now.
 See also: fault noun (MISTAKE)